The Stovebolt Site Forums The Parking Lot Big Bolts Will 58 Chevy 1 1/2 ton cab fit a pickup

I believe in the archives somewhere this question was asked before and the 261 block has a couple of (steam holes?) that the 235 doesn't have and you can drill those extra couple of holes by using the 261 head gasket as a template to drill the holes in the head. Try the search at top of page. Hope this helps.