318 Build? Help!

Just so you know;
a 4.10/33 combo maths to 65=2715 rpm .
a 3.55/28 combo maths to 65= 2770
a 3.23/25.5 combo maths to 65=2770
The point is that your 4.10s, by themselves, do NOT point to performance gears.


you can solve all your problems with Torque Multiplication, starting with a stout low-rpm engine and a good convertor.

I have an 84 D100-2wd with a low-compression 318 long-block from a 73 Dart; with nothing but a small-port 4bbl, headers, and a 2800/904. She's running 28s with 3.23s today. After I fixed the wheel-hop, she lays pretty good rubber. That 2800 was a game-changer.