cam question

jride1999 said

i pulled valve covers off numbers say 3769973 i looked them up an says 1.78 intake an 1.50 exhaust la heads.on top of carb #8867 on bottom base#9605s an 2104.Im not trying to build all out race car,just something we can take to track,my son is 4 an daughter is 10 thanx for ur guys help

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Those are '75-'76 smog motor heads..you deffinately DON'T want to be running a single plane intake,your best bet is a performer intake it has the small ports for 318 heads,the performer rpm is designed for 340-360 ports..For comparison a buddy of mine is running a '77 smog motor 318 with nothing more then a performer intake,carter carb,comp cams .477/.480 cam,and a 8 3/4 w/3.91's,his best time to date is a 14.9...