[ponjohn]

Same cubic inch?

[ta man]

Originally Posted by ponjohn

Same cubic inch?

466

[PAUL K]

Nice....are the o-rings necessary? (Assuming I'm seeing o-rings)

[ta man]

Originally Posted by PAUL K

Nice....are the o-rings necessary? (Assuming I'm seeing o-rings)

No not at all,its the way the block was just a veteran dragracer's bunch of parts that he had.Its overkill for my horsepower level but was offered at a very fair price complete.

[PAUL K]

Cool! Good for you!

[77 TRASHCAN]

Awesome!
3.23 is a real nice gear, still keeps the rev's down on the highway.

[OCMDGTO]

Just can't leave well enough alone? LOL. I went from 3.23(which I consider a great street gear) to 3.50. Revs only changed 100ish rpms at 65 mph with a 275 tire. Hindsight being 20/20 I wish I got 3.70s which would be fine for the few road trips a year I do. So don't be afraid to get a little more gear!

[ta man]

Originally Posted by OCMDGTO

Just can't leave well enough alone? LOL. I went from 3.23(which I consider a great street gear) to 3.50. Revs only changed 100ish rpms at 65 mph with a 275 tire. Hindsight being 20/20 I wish I got 3.70s which would be fine for the few road trips a year I do. So don't be afraid to get a little more gear!

I needed a shortblock upgrade soon!Couldnt pass this up!

[Lee]

Do you currently have rpm left in the powerband? If you aren't crossing the finish line at 400 or more RPM lower than your shiftpoint, I'd keep the 3.08's. Traction might become more of an issue as well.

You are already changing the shortblock, change too many variables and you might waste a lot of time chasing your tail in circles, dialing it back in.


BTW, your current combo is HEAVILY influencing what I'm planning on doing with my '73 ;-)

[ta man]

Originally Posted by Lee

Do you currently have rpm left in the powerband? If you aren't crossing the finish line at 400 or more RPM lower than your shiftpoint, I'd keep the 3.08's. Traction might become more of an issue as well.

You are already changing the shortblock, change too many variables and you might waste a lot of time chasing your tail in circles, dialing it back in.


BTW, your current combo is HEAVILY influencing what I'm planning on doing with my '73 ;-)

I'm around 700 rpm under the shiftpoint at the traps.Its not ideal for the qtr mile but it sure works on the highway.My car sounds different than a lot of cars I'm sure from the 1/8th mile where I basically go into topgear and to the finish.Instead of winding out back up to the shiftpoint and beyond my car just uses the torque it has and lumbers down the track.

On track days I like picking out 2 different types of cars to run..either newer cars that are quick or cars that launch hard with shorter gears,more stall,louder and more dragstrip oriented.Its fun running down the shortgear cars when they start to run out of gear.

[69FIREBIRD76MM]

TAMan, you defenetely influencing what I am doing with my car now too, the only difference will be my car's got a Dana 60 and tallest gear is 3.54's. I am almost done with it will be hitting the track 1/8 mile January.

[ta man]

Originally Posted by 69FIREBIRD76MM

TAMan, you defenetely influencing what I am doing with my car now too, the only difference will be my car's got a Dana 60 and tallest gear is 3.54's. I am almost done with it will be hitting the track 1/8 mile January.

Thanks,that's the best thing about this forum we influence and help each other.I honestly never thought the current combination would dip into the tens and 60 ft 1.56.

[455TA]

Ta Man, you said you are planning on going with a new converter, who are you going to use this go around since Continental is no longer? My car is down right now getting the Northwind intake with portwork, Race Pro mufflers to replace my flowmasters (full 3 inch system), Coilovers for the front, QA1 double adjustables for the rear, a new converter from PTC, ATI, or BTE - probably around a 3800 stall 10 inch unit, and 28 inch tires on a 15 inch wheel to replace my 26 inch radials.

[ta man]

That was one of the plans a while back to dip into the 10's when I was running low 11's.I figured I needed a bit more gear and a 3800 to 4000 stall to do it.I'm not directly familiar with any companies other than what guys here recommend.

Now I'm back to what has worked add power!Trying to achieve as much street friendly power out of the SD KRE's.

I'm always worried about overpowering the stock suspension on my car.Its a simple setup just CE 3 ways front and back.No traction aids at all.Its another part of the car that just puzzles people that have never seen the car.I know the day will come where I'm stuck at a certain et and I'm going to need the higher stall speed and a bit more gearing but at the same time a overhaul of the suspension will be needed.

[Half-Inch Stud]

Originally Posted by 69FIREBIRD76MM

TAMan, you defenetely influencing what I am doing with my car now too, the only difference will be my car's got a Dana 60 and tallest gear is 3.54's. I am almost done with it will be hitting the track 1/8 mile January.

DITTO. Just opened the 3.54 posi dana60 to replace to 80/90 lube with RedLine shockproof: Should cause Pinion to run much cooler & free up shear & drag friction.

Question on the Strange Dana60 tapered axle bearings: are the outer races a slip-fit? and shouldn't they be a genuine press-fit?

4L80 should get my Street/Strip goals...if i ever REMOVE the TH400.

[Lee]

I was really happy with the custom Hughes converter in my '67 Firebird. I believe it was a 10.5". It would flash to 35'ish off the line, but was VERY driveable around town and on the highway. I drove from Houston to Dallas, and Houston to Corpus Christi with it, and no problems.

I'd like to see you advance your cam 1 or 2 more degrees, and keep the 3.08's. I think it would knock your 60' a few hundredths, which virtually always lowers the e.t.. I think it would narrow your shift/trap spread, too.

[Skip Fix]

Lee I'm thinking it needs a 2.41 and run the Texas Mile in Beeville

[ta man]

Originally Posted by Skip Fix

Lee I'm thinking it needs a 2.41 and run the Texas Mile in Beeville

Must be some guys flying by the end!

[ta man]

Update Shortblock painted and waiting on topend parts and camshaft..New Romac balancer and ATI flexplate should be here today.I'm confirming TDC on the balancer once it arrives.Purists may notice the noncorrect GM blue..its my lucky shortblock color and easy to buy for touch-ups .Sorry Mike (Potent Pontiac) had to spray it blue instead of black.

[ponjohn]

Originally Posted by ta man

Update Shortblock painted and waiting on topend parts and camshaft..New Romac balancer and ATI flexplate should be here today.I'm confirming TDC on the balancer once it arrives.Purists may notice the noncorrect GM blue..its my lucky shortblock color and easy to buy for touch-ups .Sorry Mike (Potent Pontiac) had to spray it blue instead of black.

OF2?