Hot Rod Forum : Hotrodders Bulletin Board - View Single Post - 350 SBC build for Jeep. Need Help !!! Intake, carb, cam, efi and mileage.
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Old 03-29-2010, 01:24 PM
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I would NOT use a carb in this application. If you want good 4wheeling, reliability, and MPG's then even a TBI unit wins over a carb.

Don't go over 215 on the intake duration as noted and no more than 220 on the exhaust (about a 5 split). A good set of long tube headers helps a lot and in that climate/driving I would DEFINITELY get the stainless ones.

I would expect about 15MPG off the details you're describing.

Really a good low buck combo (low buck for around here) would be a Vortec 350 with a zz4 cam. Clean up the head castings a bit, slap on a set of stainless headers and get it tuned and you'd have a VERY reliable engine with great mid range and mileage.
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