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king69 Mar 3rd, 10, 06:55 PM I currently have a 69 camaro with a stock 350, stock intake, and 4brl Quadrajet carb. If I were to upgrade to a holley or edelbrock carb, would I have to change my intake manifold? What kind of carb is recommended? What cfm? Thanks! Vintage Musclecar Mar 3rd, 10, 08:10 PM Stick with the QJet, just make sure it's the correct unit for your car. rlyfst1 Mar 3rd, 10, 08:16 PM FYI, Edelbrock makes a Quadrajet Adapter Plate Adapter for mounting Edelbrock square-bore carbs to stock Quadrajet manifolds. Part #2696 docwilcar Mar 4th, 10, 07:07 AM X2 on keeping your stock intake and q-jet. Cliff's Quadrajets can rebuild your stock carb for more performance. He has written a book on doing the mods too. king69 Mar 4th, 10, 10:32 PM my buddy offered me an edelbrock performance series 600 cfm for $50 in good working condition...will i need an adapter? should it be better than the quadrajet? thanks ace's68 Mar 5th, 10, 12:16 AM The edelbrock isn't much better than the q-jet. Stick with the q-jet if the app. is mostly stock. The edelborck is a reliable carb but not that much greater in performance, you rarely see a high perf/drag car, or dragster with an edelbrock... there must be a reason. just my $.02 and i've dealt with both. TJS69 Mar 5th, 10, 07:48 AM Your Quadrajet is a 750 cfm carburetor. The edelbrock is only a 600 cfm. I think you will have better street performance with a Quadrajet, because of the small primaries and better WOT because of the secondaries being so big ! Normally a 750 cfm carb would be too big for your engine, but not with a Quadrajet ! http://i263.photobucket.com/albums/ii152/tjs69_photos/carburetors/Quad750.jpg http://i263.photobucket.com/albums/ii152/tjs69_photos/carburetors/Edel600.jpg Juicer2 Mar 5th, 10, 10:24 AM I'll agree that the Qjet is the way to go. But, if you had your heart set on a Holley for whatever reason, the 4175 series is a spreadbore vacuum secondary carburetor. It is a direct bolt on swap for the Qjet or Ebrock. No adaptors or manifold change necessary. Personally, I wouldn't recomend it but i am sure there are Holley guys that would! It seems that Qjet vs Holley is a rivalry as old as Ford vs Chevy!! Jay king69 Mar 5th, 10, 04:15 PM Ok...I found a rebuilt quadrajet for $65 which appears reasonable. I don't know the specs. Do you think it will be an easy swap if I get it? Juicer2 Mar 5th, 10, 10:01 PM King, are you having problems with the Qjet on the car now? Swapping the carbs is simple. Tuning it for your engine may take a little more work. Personally, if I were having carb issues, I would repair the one I already have instead of bolting on an unknown carb. Jay | ||