Opinion:

If you have a first run engine, you are a good candidate for a fancy
overhaul.
And you keep track of where all your low time parts are... they are in
YOUR engine.

If you have a rotten old engine, you are better off to go back to the
till for newer
parts. A factory reman. It usually is cheaper.

Horror stories abound on both sides of this one. YMMV. Bill Hale