360 driver build

Screw gear vendors. A regular A-500 will do great.

In addition to what moper was saying. In my 1st Dodge Magnum I had a 360 that got 20 mpg's. Stock engine with a factory 4bbl. intake and a Carter 625, dual exhaust off the manifolds, it also had twin cats, needed for the time, (dang laws!) A 340 trap door air cleaner w/K&N filter. An MSD fired it all off on a stock junk yard distributor.

the rear gears were 2.76's w/235/60/15's on all 4 corners. The car weighed in @ 3700 since it was loaded with everything except a moon roof. Carpet in the trunk even.

I second this. The A500 is a marvel in itself since it's a 904 variant. They are lighter and built properly stronger than any other automatic their size and probably several other larger units as well. They will take less HP to drive because of the light internals, too. Most all of the same upgrades to the 904 can be applied to the A500. In other words, you can have a nasty *** overdrive unit that's ALL Mopar. Ya can't beat it.