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Mod | | | Forums66 Topics128,078 Posts1,056,027 Members48,433 | | Most Online14,466
Apr 26th, 2026 | | AD Chevy Trucks  Over 6,000 pictures Brad Allen has an awesome collection of Chevrolet factory pictures that he has set up from film strips. Check them out!
Lots of work on Brad's part ... pure enjoyment (and references) for you!
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| | | | Joined: Apr 2010 Posts: 126 Wrench Fetcher | | Wrench Fetcher Joined: Apr 2010 Posts: 126 | i was planning on putting new manifold, but i noticed that the base of this 4jet is more narrow than the square bore holder that i have. no its not an automatic, its 4 on the floor. i just prefer the electric chokes. so (just guessing) a 283 would have about 600cfm, and a 327 would be 700 cfm (aprox)? i just cant remember the formula for figuring cfm.
66' Chevy C-30 Rat
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