As of right now my engine has the stock 2bl intake with a crappy running 2bl carb but i have an aluminum 4bl summit racing intake with a huge summit 750cfm 4bl to go with, so which should i do keep the 2bl and deal with the carb or slap my 750 on and waste lots of gas?
If you keep your foot out of it you can retain the same fuel economy. You can also tune the carb for economy rather than power. Assuming it's a vacuum type.
Why are there only two options?? Definitely go with a 4-barrel, but not a 750 (that's too big). Get a 570 to 670.
I would like to get a 600-650 cfm 4bl carb but i do not have enough funds at the moment for a brand new carb, so for now this is what i have to choose from.
Regardless of what the other mods are, a 600 is more than large enough for a stock headed 302.. Even one of the old Motorcraft or Holley 460 CFM would be plenty and have FI like throttle response... I'd stay away from the Motorcraft as jets are next to unobtainum, but properly tuned they run fine... Trade the 750 for something that fits your needs...
I would love to trade this 750 for something i can use, but i figure you would only run a 750 cfm for like drag or something.
You can probably find someone that wants that 750. Around here everyone thinks they have to have a 750 DP on a V8. People won't even take a vacuum secondary for free.
It depends on what 750 carb it is. If it's a vacuum secondary, it may be slightly too big, but not so much that it will not work. I've run a Holley 3310 750 on a mild 302 (Explorer equivalent ) for about a year and it was fine. If it's a double pumper (mech secondary) as is, it's too big, but in a pinch you can always disconnect the secondary linkage and use it as a 500 cfm 2 bbl. What intake are we talking about here ?
That's a vacuum secondary 750, it'll work. Not the best, but it will work and will burn no more fuel than any other carb if tuned correctly. Not exactly what you were thinking as a "drag race" carb. More like a middle of the road street carb. A smaller carb would only give you better throttle response on then bottomend.
One like this http://www.kijiji.ca/v-engines-and-...g-302-h-o-5-0-litre-intake-manifold/555809441 and a 1.21V 2150.