Help me please tryin to beef up 318

I agree on not using the 360 heads.And not just because of compression woes,but also because of port size and velocity.360 heads wont work well without a hi stall torque converter and steep gears,as air flow wont really move until high rpms. Your 318 will work much better with a high velocity magnum style head,like an eq or the "302" casting. And as always your best and cheapest increase in acceleration is rear gears.Something like 3:55 is a nice compromise set,which will give you a big pickup in performance without being horrible on the highway.Do you have any idea what gear set you currently have? Im going to hazzard a guess and say given the year and not being a performance optioned Dart,it most likely has a highway gear set like 2:73.