360 head on 318

Goody, with your combination you will get good bottom end, because as you stated, you have 9.7:1 CR, 3000 Stall, and 3:91 gears. This actually means that you overcome any low RPM torque losses by getting quickly into your powerband RPM with the converter and gears. With stock 8.?:1 CR, a stock converter, and probably stock gears in the 2:96 range, the 360 heads would make it a pooper on the bottom end. You've put together a well planned combination of parts and they work well for you. :)