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Dead Parrot · 01-11-2023, 10:50 AM

I tried a similar experiment with a 79 Camaro that came with a Dual-Jet on a 305. The 2bbl started flooding and I swapped in a iron 4bbl manifold/Q-Jet off of a 327 in a defunct Impala. There might have been a bit of HP gain but not much. Did loose some MPG. (the 327 was worn and would have required a rebuild).

To answer one of your questions - pre-vortec SBC intakes are very interchangeable. You do have to watch out for carb/trans linkage variations between years.

The exhaust manifolds are also fairly interchangeable as far as the motor is concerned. Watch out for accessory mount changes. Don't remember what year the AC/Alt swapped sides.

01-11-2023, 10:50 AM	#12
Dead Parrot Registered User Join Date: Aug 2012 Location: Oklahoma City, OK Posts: 2,504	Re: Mighty yet tiny 307 sbc. I tried a similar experiment with a 79 Camaro that came with a Dual-Jet on a 305. The 2bbl started flooding and I swapped in a iron 4bbl manifold/Q-Jet off of a 327 in a defunct Impala. There might have been a bit of HP gain but not much. Did loose some MPG. (the 327 was worn and would have required a rebuild). To answer one of your questions - pre-vortec SBC intakes are very interchangeable. You do have to watch out for carb/trans linkage variations between years. The exhaust manifolds are also fairly interchangeable as far as the motor is concerned. Watch out for accessory mount changes. Don't remember what year the AC/Alt swapped sides.