Recommendation for Forged Pistons and Connecting Rods

Could those pin retainer grooves in the non turbo pistons, be cut in after you get them??
I do see various wiseco pistons on ebay all the time specifically listed (there anyway) for a slant 6. The last several I saw there were all 0.045 oversized (vs a "std bore" /6) so I think it's the 2.2 pistons.