The Stovebolt Site Forums The Shop Area The HiPo Shop Chevy 235 Block and Head Measurements

AFAIK no factory diagram is available. Some here may have data to contribute.
My guess at the bore pitch: it's alternately 4-3/16”-4-3/8”-4-3/16”, &c. to avoid the 3 main bearing bulkheads between the cylinders.

1-2 4.1875”
2-3 4.375”
3-4 4.1875”
4-5 4.375”
5-6 4.1875”