a squarebore 600cfm edelbrock on a LD4B intake rocks on a small port head 318.(thats what it is for)

a stock 4-v spredbore intake with a striped and tuned q-jet is hard to beat on a 318.

the holley street dominator is a spredbore/small port/low rise/open plenum that is for a small port 318 head.it works better than one would think it does as an open plenum on a stock engine.( I used a holley 650cfm sperdbore DP with mine on a stock 318.

I like the q-jet on a 318 for ease of dialing in the tune.