Just to let you know these were originally made for the 82-87 Z28s, then GM used them on the 88 Sport Coupe, 89-92 Rally Sport. In 88 GM droped the Z28 in favor for the IROC so they got a new style of aluminum rim. After the 3rd gens used them GM decided to use the left over 5 star rims on the S10's in the early 90's. this style of rim was never used "from the factory" on any of the pontiac fbodys. They had their own style rims for thier different car models.
Welcome to an incredibly fun project

more like frustratingly painful fun project.
Heres mine once I finished, lots and lots and lots of sanding along with removing quite a bit of metal to get this,