Building a 347

[mkeefer]

I'm putting a 347 together and running into some small clearance problem's where the crank and pistons meet at the bottom of the stroke. I believe all pistons will need to be clearanced. The couple I have checked touch in two or more places but the motor will still turn. Is it ok to just barely clear, a few thousanths, or do I need to really remove a lot of material. This is not a street motor, it is a full race 9000rpm blower moter, billet crank, oliver rods and JE custom pistons. The last motor used wiesco pistons and cleared the crank. I am doing this myself, please don't recommend another shop to assemble. Every one we have used in the past did something wrong. A LONG list.