[Brewster]

Yea thats right, Harrison right?
That hose clamp should be at 6:00 o'clock not noon.
Later,
Brew

[165th]

The tag didn't have a 'Harrison' logo on it that I could see.

Should the part number have 11 or 111 in it. It was hard to tell if the third 1 was just a mark or a number 1.

The package would have arrived today except that Fedex Ground doesn't delivery on Mondays. I'm sure it'll be here on Tuesday!

Thanks for the tip on the hose clamp. At least my original GM lower hose, complete with embossed numbers in the rubber is installed right side up!

[Dens71TA]

Originally Posted by Brewster

Yea thats right, Harrison right?
That hose clamp should be at 6:00 o'clock not noon.

Brewster, I've run across a few very original Firebirds in some old salvage yards that don't crush any of the cars and they all had the tower clamp pointed at 12 o'clock like 165th's car.

['ol Pinion head]

Hate to butt in but seems like a logical place to ask a few other 2nd Gen Harrison radiator questions.

The 4 core Harrison radiator from my 4spd '72 T/A has round flat type screw in plugs in the holes where tranny cooler lines would go in an auto radiator. I believe these to be original, as I've had this project & radiator for a lonnnnng time & had other what I believed to be original 4spd 4 core Harrison 2nd Gen radiators with these plugs. Also, the Harrison 4 core radiator I have marked to recore & go back in my '79 4spd car also has these plugs (would take a large flat head screwdriver type bit to even attemp to unscrew). Both of these radiators appear to never have been through a radiator shop.

Can anyone support my belief that the 2nd Gen auto tanks were used but were plugged at Harrison with these plugs for 2nd Gen 4spd use??? Realize original Harrison 68+ A-body 3 & 4 core radiators used a solid passenger side tank, as I have a wide variety of original A-body radiators.

Last, have a good friend who is doing a concours resto on his '73 4spd SD. What code 3 core Harrison would be correct for it? Would it also be "plugged"??? Going through all my Harrison radiators later this week & would like to pick out him the right one. THANKS IN ADVANCE..

[165th]

Lloyd, that is very helpful. Thank you very much.

How can you distinguish the '73 year from the '74 year based on the tagged information?

[Lloyd-TX]

Originally Posted by 165th

Lloyd, that is very helpful. Thank you very much.

How can you distinguish the '73 year from the '74 year based on the tagged information?

Refer to my reply to Roger's question - different tag codes altogether.

Glad to help!

[Lloyd-TX]

Originally Posted by 'ol Pinion head

Hate to butt in but seems like a logical place to ask a few other 2nd Gen Harrison radiator questions.

The 4 core Harrison radiator from my 4spd '72 T/A has round flat type screw in plugs in the holes where tranny cooler lines would go in an auto radiator. I believe these to be original, as I've had this project & radiator for a lonnnnng time & had other what I believed to be original 4spd 4 core Harrison 2nd Gen radiators with these plugs. Also, the Harrison 4 core radiator I have marked to recore & go back in my '79 4spd car also has these plugs (would take a large flat head screwdriver type bit to even attemp to unscrew). Both of these radiators appear to never have been through a radiator shop.

Can anyone support my belief that the 2nd Gen auto tanks were used but were plugged at Harrison with these plugs for 2nd Gen 4spd use??? Realize original Harrison 68+ A-body 3 & 4 core radiators used a solid passenger side tank, as I have a wide variety of original A-body radiators.

Last, have a good friend who is doing a concours resto on his '73 4spd SD. What code 3 core Harrison would be correct for it? Would it also be "plugged"??? Going through all my Harrison radiators later this week & would like to pick out him the right one. THANKS IN ADVANCE..

Interesting observations, Roger. Can't add anything, 'cause EVERY Pontiac I've owned until my Sundance GTO has been A/T equipped.

Here are the radiator codes from my June '77 MPC:

As in 1974, the 1973 455SD cars called for the same radiator as the D-port 455's Even many 350 and 400 Firebirds used these same radiators when A/C or HD cooling equipped.

Standard cooling M/T: tag code "FX"
Standard cooling A/T: tag code "FU"
HD cooling or A/C M/T: tag code "FT"
HD cooling or A/C A/T: tag code "FW"

[necdb3]

Originally Posted by 'ol Pinion head

Hate to butt in but seems like a logical place to ask a few other 2nd Gen Harrison radiator questions.

The 4 core Harrison radiator from my 4spd '72 T/A has round flat type screw in plugs in the holes where tranny cooler lines would go in an auto radiator. I believe these to be original, as I've had this project & radiator for a lonnnnng time & had other what I believed to be original 4spd 4 core Harrison 2nd Gen radiators with these plugs. Also, the Harrison 4 core radiator I have marked to recore & go back in my '79 4spd car also has these plugs (would take a large flat head screwdriver type bit to even attemp to unscrew). Both of these radiators appear to never have been through a radiator shop.

Can anyone support my belief that the 2nd Gen auto tanks were used but were plugged at Harrison with these plugs for 2nd Gen 4spd use??? Realize original Harrison 68+ A-body 3 & 4 core radiators used a solid passenger side tank, as I have a wide variety of original A-body radiators.

Last, have a good friend who is doing a concours resto on his '73 4spd SD. What code 3 core Harrison would be correct for it? Would it also be "plugged"??? Going through all my Harrison radiators later this week & would like to pick out him the right one. THANKS IN ADVANCE..

72 T/A 4spd did not have auto trans cooler with plugs. This is the original rad to my 72 TA 4spd

['ol Pinion head]

Originally Posted by necdb3

72 T/A 4spd did not have auto trans cooler with plugs. This is the original rad to my 72 TA 4spd

Refreshing my comments on old old post. Figured out since my initial post in this thread, 12 years ago, that the Harrison 4 core radiator that was in my '72 T/A was not original, but had been swapped in. The dime sized screw in plugs for gutted automatic tanks were occasionally used by Harrison, have ran across them quite a few times, but since no factory 4 core radiators were avail in '72 Birds, no possible way the prev radiator is original.

[necdb3]

Originally Posted by 'ol Pinion head

Refreshing my comments on old old post. Figured out since my initial post in this thread, 12 years ago, that the Harrison 4 core radiator that was in my '72 T/A was not original, but had been swapped in. The dime sized screw in plugs for gutted automatic tanks were occasionally used by Harrison, have ran across them quite a few times, but since no factory 4 core radiators were avail in '72 Birds, no possible way the prev radiator is original.

Correct, I used to work as a tech when those cars were on the streets. The replacement radiators had the plugs so they could be used in either application.

[Norwood]

Originally Posted by necdb3

Correct, I used to work as a tech when those cars were on the streets. The replacement radiators had the plugs so they could be used in either application.

As well as original equipment.

[keith k]

Originally Posted by 'ol Pinion head

Hate to butt in but seems like a logical place to ask a few other 2nd Gen Harrison radiator questions.

The 4 core Harrison radiator from my 4spd '72 T/A has round flat type screw in plugs in the holes where tranny cooler lines would go in an auto radiator. I believe these to be original, as I've had this project & radiator for a lonnnnng time & had other what I believed to be original 4spd 4 core Harrison 2nd Gen radiators with these plugs. Also, the Harrison 4 core radiator I have marked to recore & go back in my '79 4spd car also has these plugs (would take a large flat head screwdriver type bit to even attemp to unscrew). Both of these radiators appear to never have been through a radiator shop.

Can anyone support my belief that the 2nd Gen auto tanks were used but were plugged at Harrison with these plugs for 2nd Gen 4spd use??? Realize original Harrison 68+ A-body 3 & 4 core radiators used a solid passenger side tank, as I have a wide variety of original A-body radiators.

Last, have a good friend who is doing a concours resto on his '73 4spd SD. What code 3 core Harrison would be correct for it? Would it also be "plugged"??? Going through all my Harrison radiators later this week & would like to pick out him the right one. THANKS IN ADVANCE..

Agree with necdb... I've had '70 and '76 original HD 4-spd radiators that had a clean/no hole/no plug right side tank.

[necdb3]

Originally Posted by keith k

Agree with necdb... I've had '70 and '76 original HD 4-spd radiators that had a clean/no hole/no plug right side tank.

If you look at the picture I posted, you can even see that the tag shows a "CV" tank. Look closely at the tank and you can read the "CV" on the tank.

[keith k]

Originally Posted by necdb3

If you look at the picture I posted, you can even see that the tag shows a "CV" tank. Look closely at the tank and you can read the "CV" on the tank.

Yup - same as the two I have. CV end tanks are not easy to find...

[Norwood]

Originally Posted by 'ol Pinion head

Can anyone support my belief that the 2nd Gen auto tanks were used but were plugged at Harrison with these plugs for 2nd Gen 4spd use??? Realize original Harrison 68+ A-body 3 & 4 core radiators used a solid passenger side tank, as I have a wide variety of original A-body radiators.

Some times I like looking thru the old threads just to gain more knowledge......

The original Radiator in my 70 T/A has these plugs. I had it recored but they are the original tanks.

[70RAlll]

Automatics had a "CU" passengers side tank and Manuals had a "CV" passengers side tank. GM was notorious for using "parts that fit" when they were short just to keep the production line moving. Like the sway bars on 70-71 TA's that we have discussed. I could easily believe GM ran out of CV manual tanks and just plugged the opening for the tranny cooler on auto tanks and installed them on manual cars. Easily.. That is probably what you guys are seeing here with original tanks with plugs. BUT...CV is a manual specific tank and CU is an Automatic specific tank.....

[starlightblack]

Originally Posted by 'ol Pinion head

Hate to butt in but seems like a logical place to ask a few other 2nd Gen Harrison radiator questions.

The 4 core Harrison radiator from my 4spd '72 T/A has round flat type screw in plugs in the holes where tranny cooler lines would go in an auto radiator. I believe these to be original, as I've had this project & radiator for a lonnnnng time & had other what I believed to be original 4spd 4 core Harrison 2nd Gen radiators with these plugs. Also, the Harrison 4 core radiator I have marked to recore & go back in my '79 4spd car also has these plugs (would take a large flat head screwdriver type bit to even attemp to unscrew). Both of these radiators appear to never have been through a radiator shop.

Can anyone support my belief that the 2nd Gen auto tanks were used but were plugged at Harrison with these plugs for 2nd Gen 4spd use??? Realize original Harrison 68+ A-body 3 & 4 core radiators used a solid passenger side tank, as I have a wide variety of original A-body radiators.

Last, have a good friend who is doing a concours resto on his '73 4spd SD. What code 3 core Harrison would be correct for it? Would it also be "plugged"??? Going through all my Harrison radiators later this week & would like to pick out him the right one. THANKS IN ADVANCE..

Circling back on this old thread and this question by OPH I'd like to add pictures of the rad from my 1973 Brewster Green 4-speed Trans Am. This car has most of its original parts - drivetrain, starter, alt, even the rad hoses and battery cables. The big rad tank is embossed AE and dated A - January. This is a January built car per the trim tag. AE, as I understand it, is an automatic code, though this is a numbers matching 4-speed car. As you can see, it has the screw in plugs which have been there a long, long time. Likely from the assembly line, like the examples OPH and Tellyshavilli have witnessed. I assume the rad tag has simply been lost to time though, or possibly never installed at all.