A 307 is a 283 with a 327 crank. You can look up specific dimensions at mortec.com
Well a 307 has a bore of 3.875 and a stroke of 3.25, so to build a 350 out of a 307 you would need to bore out the 307 .125 inch to a 4 inch bore, which in most cases can not be done, and you would have to put a 350 crank which has a stroke of 3.48 inches and use 350 pistons. But if you want more cubes and power out of your 307 you can bore it .03 over, have it decked .025 inches, and use a 350 crank with 400 rods and 307 pistons to make a ground pounding 333 stroker.
307 Cu. In. Produced from 1968-1973.....Bore 3.875....stroke 3.25
Bore 4.250" Stroke 4.00"
BORE is 3.740 and the stroke is 3.480
4.00 bore 3.48 stroke
The bore would be 4.310" and the stroke is 4.00"
4.312 bore x 3.50 stroke.
307 pistons are 3.875" diameter. 305 pistons are 3.736". It might be possible to bore a 305 large enough to accept the 307 pistons, but the wrist pin location would be .230" off because of the different stroke. In short, no.
4.000 inches -- same bore size as a Chevy 350, the difference is a 327 uses a 3.250 stroke and the 350 uses a 3.480 stroke.
4.25X4.56
The Bore of a 350 cid engine is 4.00, the stroke is 3.48 inch..
The bore and stroke is---3.740 bore and 3.480 stroke. STOCK 305