Yeah, Motor comes out, tear it down, clean it thoroughly. As far as a machine shop, no if you have or have access to the correct measuring instruments for bore, main bore, cam bore, rod size and crank diameters.
Personally, I would take all of it for a hot tank and inspection. Much cheaper than buying all the tools. I have most of them, but still would ,only as a double check on myself. It doesn't cost that much.
Now, on the flip side, I have seen (DO NOT RECOMMEND) people pull the pan, pump, clean them, put it back together with no firther rip down (You're gonna have a CAM AND LIFTER INSTALL AT LEAST) Then put it together, fire it, for a few seconds, change the oils and filter, do that like 3 or 4 times, call it good and run it. And some have run for years.
Depends on whether you have the luck of the Irish or not, I guess! never trusted in that.
Ray