It's out of a second series truck. But, the glock and caps are for doweled bearings which I think were used only in the first series. That's part of the questions. Should have added it to the first post. The counterbores are undersized in the verticle about .005, and they are about right side to side. The book for first series says to start with .006 shims and work from there. That would say it's most likely a first series motor. I"m pretty sure it's the original motor for the truck, but by that age, who knows. I'm taking it to a shop run by an old guy (even older than me and that's a lot) who has worked on these engines for his career. I'll see what he has to say. Just hate to spend $ on line boring if a set of shims is all that's needed.
