Were gonna have to start a forum for the "misfits"

a 318 is a 340 with 22 less cubes, the heads just made the 340 what it was. You can do all that stuff with a 318, higher compression pistons and large valve heads. The 318 I had (for 3 weeks) was the smoothest motor I ever used in my car, and that goes for the stock 4bbl 273 (fun, tight motor but lacked low end even with its hi compression pistons, the 'lo-po' 318 with all the 273 stuff on it was lower compression but faster off the line and wound just as fast. Both 340s I had were fast as hell but both had a shimmy in them I couldnt get out. This 225 runs like a watch but I have yet to wind it out yet. Build your 318.....have fun. Ask your Chevy buddy why was the 400 SB a dud, but their 383's are all the rage?