Mild Torque 318 suggestions wide open!

Sounds like low end torq is your greatest concern, so the easiest and cheapest way to dump a bunch of low end grunt in your car is get a 360.

If you are moving forward with the 318.....

• TTI head pipes (2.5"), with 2.5 in duals out the back. Make sure your exhaust manifolds are at least 1 7/8", but bigger is availible
• 302 heads will help, because you'll need the compression for low end grunt
• Weiand Action plus intake is a good choice
• Cam will open a huge debate..... but no bigger than a stock 340 cam.