I did that on my current 340. I built it about 25 years ago, and it still runs great. I built a several motors before that, and I never checked anything. If the machine shop said the bores were 0.030 over and the crank was 0.010 0.010, I just bought 0.030 pistons and rings and bearings. Then I put things together without checking anything. I guess I was lucky?
