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Message: <blockquote data-quote="MustangBrad94gt" data-source="post: 663181" data-attributes="member: 10747"><p>I would run a 750 vacuum secondary(if your running auto trans) you can jet down a little for the stock 351w if needed, the 750 will give you room to grow if you decide to change cam & heads ect. in the future, on a standard shift car, I would go 750 double-pumper, again this will leave room for upgrade, without buying another carb, I have been building holleys for years, love them. I install power-valve blow-out protection in the base plate of all mine, In my opinion, thats the only thing thats aggravating on a holley-blowing out a power valve, I use to run a 750 d.p. on my 306, f-cam, pro-comp 200cc heads, vic junior intake-loved it- milage wasnt great, but with 4:10's ran 11.60- Brad</p></blockquote><p></p>