The Stovebolt Site Forums The Shop Area Engine Shop My '57 235cui Bored Out , 40 over

Hi guys,
looking for some advice here. I recently brought my 1957 Chevy 235 to the engine rebuilder. The motor was burning oil, and was very tired with 160,000 plus miles. The builder said the motor was run down pretty good. He had to bore it out 40over. I was concerned with overheating issues or other problems at this bore level. He told me I have nothing to worry about, and that 40 over was no problem for this motor.
I will have a Fenton dual intake with Fenton exaust on it as well. Anybody on here have a motor bored out 40 over that can give any advice? Is the builder correct in saying that I wont have issues? THANKS - J.R.