Unless you're going to go with those fancy 16 inch or 17 inch Rally IIs like njsteve has on Gramma's car, go with the deep dish 8" WS6 snowflakes. The old Colin Chapman axiom of "add lightness" comes into play here. The car will feel and handle better with the WS6 wheels, especially the gold ones which contrast nicely with Marty Blue. Lots to think about.
Pic of my plate