Rebuilding my gsr block

Machine shop said they carry safety p73 piston but can order Nippon p73 if I want.

Also going .5mm/.020 over, if that matters

Also NPR or Hastings rings?

Please put your input thanks

 

Safety pistons? Never heard of them. Don't go cheap, ring lands tend to break and poor quality pistons.

Either rings are fine. Just get them gapped to the correct spec.

 

The features offered on Safety Pistons look interesting, anodized crowns, several skirt coatings as well.
If I trust my machine shop I usually go with what they recommend when it comes to sourcing parts, I would make sure they are willing to cover warranty on parts and labor though.