[steemin_ehman]

I've looked into doing the centerlines - the easiest would be to buy the centerlines, and take them to a machine shop. They would cut them all for a couple hundred - once one is set up, the rest are just a copy. The only problem with the centerlines is that you cant get the extruded ring just inside the square cut holes.

Steel rims would be heavy, but no heavier than the steel 20in "spare" wheels on new pickups. This look would be more authentic, and cheaper in the long run IMO.