to take off. I dont know how much to take off. I bought it from someone on here, cant remember who, and he told me that I should get it resurfaced before dropping it into a newly built engine. So, I dont know what to tell him. He said he sandblasted the backside and it looks like new I guess? But he asked what do I want him to do on the front cuz of the groves where it hits the clutch. And I have no idea what to tell him.