[53lowdown]

69 C10, with original 307 block - PO had it bored when it was rebuilt - but he's long gone and didn't know how much it was bored. So it's most likely what size? Can you bore a 307 out to 4 inches to make it a 327? Is that what most shops would do since the 327 pistons would be easy to find? Just curious. Trying to track down the rebuilder but so far no luck.