For your stated usage in a previous post, seeing as how your engine will rarely be at WOT, never mind at high rpm, IMO, unless the heads are coming off anyway, I agree with ch1ll, in post #2.
Now, if you were to pull out the hiway gears, and stick 4.30s in the back, Ok, now we're in a new arena.
But consider this;
3500 rpm with 2.76 hiway gears, an A904, and 26"tires at 10% TC slip, makes, 37.4mph; and Not to be mean, Brother, but Ima thinking your car will have been stuffed into Second gear, long before that.
I think I know what you want.
You want a lil kick in the azz off the line, and a snappy throttle.
and I'm pretty sure that's all you want. If I got that right, then all you need is a 2800 stall, and maybe some 3.23s, and a tune.
After that, a 4bbl and a free-flowing exhaust; both at the same time; but, unless the tires spin, that will only pick up where the stall leaves off. No need to open the engine up, unless she's tired.
Throttle response, in an 8/1 2bbl engine is gonna be more the the stall, and the tune.
If you install a 4bbl, without a higher stall, please let it be a small-port intake with a spreadbore, with triple boosters in the Primaries..
I realize this probably not the answer you wanted,
but it might be the answer you need. friend
