[War eagle]

Well Craig if Summit is totally wrong with their description and yours is correct regarding the 2802, it doesn`t make me real comfortable. Ok, how is the idle? A little choppy or smooth? I would also like to add that the 421 is in a 2200 lb Tempest which you didn`t know and not in a 5500lb wagon. Not trying to argue anything here, its just that you didnt know the weight of the car or size tire to say "too much torque." Hell I may have a 6800lb Pontiac Bonney hearse. My 1966 Master Parts Catalog shows the 1966 GTO XS engine used the 744 and of course in later years like you mention.

Thanks 61-62. That was closer to the answer I kinda needed.

[Poncho-V]

A 744 or similar cam in a 400 will have a much more noticeable lope than in a larger cube engine. The rev range given by Summit is more than likely for a 400. The range in a larger cube engine will be lower. They are just salesmen, not engine builders. And just an FYI, I would trust Craig....

[Craig Hendrickson]

Originally Posted by War eagle

Well Craig if Summit is totally wrong with their description and yours is correct regarding the 2802, it doesn`t make me real comfortable. (snip)

While at H-O Racing in the 1970s I made thousands of Pontiac-specific cam recommendations and sold a like number to satisfied customers.

The fact that this is going into a 2200lb Tempest does make a big difference. What you essentially have is a 1963 Tempest 421SD. I've personally owned two 1963 Tempests, one with a 428 and one with a Ram Air III 400. Also, I personally know Jim Christensen who owned the ex-Mickey Thompson #749 A/FX Factory 421 Tempest drag car. I know from where I speak.

Given the additional information, the Summit 2802/744 is not enough cam for your combination. Pontiac used the McKellar #10 mechanical flat tappet cam (essentially a Ram Air IV) in all of their 1963 A/FX cars. Summit does not make a hydraulic flat tappet with enough duration for what you have. Therefore the 2802 will seem mild in your setup.

But, it's your car and your $. Do what you want. I have nothing further to say on the subject because I told you what I think and I don't sell cams anymore.

[War eagle]

Thanks Craig. My typo was a HUGE error. I met 3200 lbs. Sorry. I must reread stuff for sure.
Great thing about 3.36 as I found out with a stock 66 SS396 Chevelle, is how the gear is flexible. A set of small dia or larger dia can put you exactly where you want if heading for the strip or a 300 mile interstate road trip. The Chevy had 3.31 but you get the idea.

A leading Pontiac performance builder and distributor of Pontiac performance parts suggested the 067.
McCarthy in his books liked the 041 and said ANY Pontiac could use this and mentioned street/strip as its use. (1.52 rockers)
Jim Hand I think has a 4000+ wagon and regardless of the torque put out by the 455, he runs 3.55 gears!!!
It looks like it will back to trial and error. The variables are just too great for anyone to predict the correct cam or even come close.

My thanks

[Craig Hendrickson]

Originally Posted by War eagle

Thanks Craig. My typo was a HUGE error. I met 3200 lbs. Sorry. I must reread stuff for sure. (snip)

OK, with the above correction, I have one more thing to say. A few years ago for my personal use I restored a 1979 T/A W72 (400CID, 8.2:1 CR, 6X-4 heads) with B-W Super T10 and 3.23:1 rear gear. Because I wanted a driver, I installed a Summit 2801 cam (like a Pontiac 068). In retrospect, it was not enough cam. One barely knew there was a cam in it. A few years later, I sold it on ePay.

(snip)It looks like it will back to trial and error. The variables are just too great for anyone to predict the correct cam or even come close.

This statement is completely wrong.

[Kenth]

The Summit line of camshafts, as good as they are, are NOT the same/comparable as/to the Pontiac OEM grinds.
Summit cams got less LSA, more lift, less overlap and less time on the lobes.

And for the McKellar #10, they have even more squared lobes than the #744, with the RAII/IV duration at .405" lift and 1.5 rockers.

http://www.wallaceracing.com/camcode1.htm

http://www.pontiacpower.org/PontiacCams.htm

http://www.classicalpontiac.com/restoration/cams.html

[455abody]

Originally Posted by Craig Hendrickson

OK, with the above correction, I have one more thing to say. A few years ago for my personal use I restored a 1979 T/A W72 (400CID, 8.2:1 CR, 6X-4 heads) with B-W Super T10 and 3.23:1 rear gear. Because I wanted a driver, I installed a Summit 2801 cam (like a Pontiac 068). In retrospect, it was not enough cam. One barely knew there was a cam in it. A few years later, I sold it on ePay.



This statement is completely wrong.

Hello Craig my name is Brian I know you would be the best to pose this question to.Looking to cam up my 68Gto H.O. I think when the rebuild happened a few years back the owner put in a 066 or 067 cam.Looking for something I don't have to swap out the springs on,I have always used the 068 in most of my Pontiacs great cam-can you recommend something a tad more aggressive.MY combo is 68 400YZ 16 heads automatic trans 355 posi electronic ign. h/o exhaust manifolds. Thanks Craig for all your input over the years. 10.5 stock compression. Brian