i don't think I'd be doing any porting, I might polish it up, or maybe a mild mild port, just to match it up to the header / im, but I'd rather have a smaller combusion chamber as then I can use flat top pistons which have many advantages over dome pistions. Flat tops come with valve relievefs right? So I think I'd use those. 85 mm on a B20 or 81.5 on a LS, what about those cams?