Main Bearing Fits Loosely in Billet Main Cap

[WE2Regal]

weird ya would have to go 40 over on a low mileage block. Anyway I'd look for another block rather than using a NOS block. NOS would bring a lot of $$.

Yeah I know. That block had been sitting in a guy's garage for 20 years. Didn't look that bad, but one spot of rust in a cylinder wouldn't clean up. After this fiasco, I wanted a block done without any drama. Since I already ordered the .040 Ross custom pistons to stock eliminator specs, that's what the NOS block was bored out to. But it's OK. I still have another.

 

[Turbo Archie]

Yeah I know. That block had been sitting in a guy's garage for 20 years. Didn't look that bad, but one spot of rust in a cylinder wouldn't clean up. After this fiasco, I wanted a block done without any drama. Since I already ordered the .040 Ross custom pistons to stock eliminator specs, that's what the NOS block was bored out to. But it's OK. I still have another.

What are stock eliminator specs?

 

[WE2Regal]

NHRA has a guidebook that gives specific information on piston design for most engines as reported by the car manufacturer. A little wiggle room here and there but not much. You can use any piston company but in the case of the Buick V6, only Ross and J&E are approved by NHRA to put a stamp on them certifying they are within those given tolerances. That way they won't have to waste time measuring them if you are torn down to prove NHRA legal.