Re: is 600 cfm carb on a 400 SBC to small?
350 head will absolutely work on a 400, done it several times. You can drill the steam holes and be good to go! If you want to save money and still get some performance look for a set of dart iron eagles or even some old 461 camel hump heads.
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'70 2wd swb, 406 sbc, air ride and a big smile on my face!
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