I recently cut down my stock '69 wheel. It was 17" now it's 15.5 which is perfect diameter for me.
This shows the original 17" comparted to the 15.5" after being cut down.
This is what it looks like in the truck.
I slicked out the texted portion of the wheel and radiused the cut lines to carry the radius of the corners. This gives it an oem look with just a hint of a modern accent.
Cheers!
Mickm