Go cheap

Certain things with machine work can be a good example. For instance, the bore. If you have a bore that's out of spec......but not by a mile, and you're building a pretty hot street//race engine, you can get by without boring. True high performance engines like being loose anyway. The key is to make sure the ring gaps are correct. I've run forged pistons with between .010-.012" clearance and it ran great. File fit the rings and it didn't use any oil. Sounded like a diesel till it warmed up from a little piston slap, but it was a good motor.