Chevy built a 302 in the late sixties. It used a 327 block with a 283 crank.
A 307 is a 283 with a 327 crank. You can look up specific dimensions at mortec.com
4" bore, 3" stroke My 301: High-nickel content 283 (1963 Impala) block bored to 4" 283 crank (3" stroke) 302 dome-top pistons and "pink" rods 291 Camel-hump heads (unported) Pretty much 302 parts with a 283 crank/block
No, Ford has never built a 283. The 283 is a Chevy engine.
A typical small block Chevy weighs about 500 fully dressed. A 283 may be slightly lighter, but I'd bet it's every bit of 450. Especially if it still has the stock iron heads and crank.
Chevrolet did not build the 283 in 1968. The 1967 Chevy 283 had from 195-315 hp depending on how it was set up.
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307. Hmmm. That was a 283 block, 3, and 7/8ths bore, with a 327, or 350, for that matter, crank. Actually the 327 crank, was small journal, so that is your guy. Actually, unless you absolutely need that motor for a numbers matching car, (I cannot think of any vehicle that motor came in where numbers on a 307, would increase the value) then this motor would be best holding your boat steady, while fishing. I had a buddy that paid me a fortune, one time to try to make one of those things run a quarter mile. We were never successful. You will have to order things accordingly as to a 283, or 327. The cam, heads, and intake, are the same as SBC. Rings, for a 283, bearings for a 327, ect. That was a memory jogger.....