I have two Chevy 235 engines one was in my truck the other was donated to me. I started tearing into them today to see what I have.

Block number one has been bored to .060 and has some vertical scratches in the cylinder walls. The pistons look like new. The main and rod bearings appear to be .010. The cam shaft looks like new it also has some spots of orange paint on it. (Does that mean anything?)

Block number two has been disassembled for a while. There is surface rust on the block deck and in the cylinders. The cylinders appear to be standard sized.

So what should I do?
I was thinking the best bet would be to clean up the rusty block. Would it be foolish to over bore that block to .060 and use the good pistons just because that is what I have on hand? I think it would clean up fine for .010 pistons but I would have to buy the new .010 pistons.

Also if someone with an old parts book could you verify the size of some bearings I would appreciate it.
Rod bearing markings ….GMML…8771.…187N5
Main bearing markings….GMML…8779.…160B5
I think they are both standard size but it would be nice to know for sure.
Thanks.