Apologize if this is spam to you all, but I searched several times through all 700+ pages of old topics....
I have a '58-'62 235 according to the block casting #. How do I tell if it already has a "high pressure head" or needs the modification described by a couple of members? It did come out of a truck. Thanks from a "newbie" (my last project Chevy was before Al Gore invented the internet)
