i dont know exactly how much power you can build with a 318, but i think i just built a screamer. i plan on dropping it inot my 73 chally and all i wanted was a good street motor. 90% street at most 10% strip. i dealt with a very highly recomended machine shop here in balt. the list is as follows. bored .030 over, crank turned .010, new oversized pistons, original heavy duty 318 con rods, Comp cam 270 cam (the part number eludes me right now), a set of the eddy performer rpm aluminum heads, eddy performer manifold, comp cams pushrods, comp aluminum hydralic roller rockers for a small block, hedmann headers, new mopar perf aluminum 6 blade water pump, carter street fuel pump, new electronic conversion kit from mopar perf, ARP engine bolt kit, new mopar perf oil pan, a cloyes dbl roller timing chain, a whole new rebuild kit from summit, im adding a 1/2" spacer for the carb and a mighty demon 650 cfm sitting on top. i hope this engine is awesome when im done.