Need your opinion. To rebuild or run as is?

Thanks! I was really feeling that I it wouldn't be smart to put it in without a total rebuild, but I haven't done any swaps like this. I wasn't sure the likelyhood of something being wrong with it. But I figured you guys would know best. I'll look it over the best I can without tearing it down and if nothing stands out I'll do the maintenance you all suggested and the brakes and run it.