stock 318 more torque?

How wild do you want to get?

I had a 1974 plymouth valiant with a 318 that could pull a house off its foundation with all of the torque it had.

All I did was put in a new cam (Crane unit, I can try to find the part number if you want it), high rise dual-plane intake manifold from a 360 (higher ports, but it worked- I would advise NOT to go single-plane on stock heads/cam), a 600cfm eddy carb, and a single 3" exhaust. I kept the tranny and rear end stock (8-1/4" with 2.76:1 rear gear) and it was a fun little car. If I had headers and a dual exhaust like you have, I would have been plenty happy.

Tell us your main goal and we can be a lot more specific.

-Mike