as a first time engine rebuilder the valves felt a bit sloppy as I pulled them through the guides, I'm hoping when I take the block to the shop for its bath they can probably give me a better idea whether or not it needs guides. Today I got around to cleaning off the main bearings and there is a stamp U .010, the pistons are stamped .030, the water distribution tube came out easily and intact and there is absolutely no ridge on the cylinder walls. It's clear to me I am not the first to have this engine apart and I kind of wished I had just started it up before I took it apart but I guess you dont know for sure what you have until you get it all apart. I sure appreciate the knowledge in this forum.