Power steering question
 

I have a 1970 C20 with power steering. It's a new truck to me, but recently i threw the power steering belt and shortly thereafter replaced it. I noticed a lot of play in the belt and after further inspection found a mounting bolt missing from the pump that's allowing a lot of play in the pump as well. My question is what size of bolts does the pump require? I've done a lot of research but I can't find the size of the bolts. I just want to make sure I'm using the proper size. Thanks in advance.

I going to guess a 3/8" x 18. You might put a flat, and lock washer under it.

call around to junk yards, find one, go look