stock 318 more torque?

Let's add this up:

What "is" the engine? Has the 4bbl manifold been added? Does it have stock heads? Was this a "cop car" 4bbl engine?

You say you have headers

What do you know about the cam, is it stock?

Offhand I'd say that if it's a stock 318 cam, adding the "modern equivalent" to the old 340 "stick" cam would wake that thing right up.

The second thing you MUST do is either recurve the distributor, or buy a performance aftermarket distributor with a short curve.

You want about 20-22 crank degrees "in the distributor", and run around 34--36 total (not counting vacuum, with at least 12 and maybe 15* initial.