Since a 230/250 Pontiac block is completely different than a 230/250 Chevy block, you are assuming they have the same deck height.....better confirm first before you purchase pistons.
For the 250 OHC the block, crank, rods, pistons are all the same. The heads are different between a 1bbl and a 4bbl. The spare OHC I have is a 1bbl BUT I may want to freshen up the pistons in it. Cast pistons are around $350 and I think the forged are $500 so not that much more. I don't think the block needs to be bored (visual check only) but I need to measure it.
I want to run these engines for another 45 years LOL and I don't think the old AL pistons will make it with today's fuels or into the future.
