I would narrow down cam choice and go with a compression ratio thats suits that cam, pick 3 or 4 cams to start and get peoples feed back.
plus what rear gears and stall level are you willing to run?
I know this ain't a drag car but it helps to know what level of performance your shooting for eg like 90's 5.0l mustang/ 73 340 duster 15 flat ish or like 70-71 340 4 speed duster etc..
plus have you read 318willrun low dollar 318 build, probably something similar to your wants.
