318
.30 over
fully ported j heads with 1.88/1.6 valves
284/484 mp cam
ld4b intake
750 dp
carter fuel pump
spitfire headers
2-1/2 exhaust xpipe
4 speed/custom 10 inch clutch
3.23 gears
13.71@101mph in my 64 valiant
keep the 318 and get some heads and a good size cam, etc.... you can build a 318 the same as any other engine... onnly downfall is you need good flowing heads because they come with sucky heads and you need to get the compression up with either popup 11;0 pistons keith black makes em or possibly get some 302 heads and a standard piston will keep some decent compression then...