I'm looking to rebuild my 307 sbc. I was wondering how far the block can be bored to? How much would it cost to bore the block and machine it? I'm under the impression I can use up to a 4.000 inch stroke. How much displacement can I get out of this engine?

Steve

Here is some info on another post that you might find your answer in. Lots of good info there.

http://www.chevelles.com/forum/ultimatebb.php/topic/9/17178.html

Looks like it could be bored to 312 cubes.

Chris.

Steve,
If you are looking for the most cubic inches possible, you are probably better off starting with a different block. The 307 is a small bore engine (3.875 vs 4.0(350) vs 4.125 (400 block)), that has a short stoke (3.25 vs 3.48(350) vs 3.75(400)). I am not sure how much you can bore them or if the block can be made to take such a long stroke. I would look at finding a 350 block and make it into a 383 or a 400 block and build a 406. IMHO it would be less trouble and a safer approach.