rusty55, going to 5 lug, Huston54's advice is right on, that will get a 5x4.75 bolt circle using the Camaro diff. That's a common GM size for the intermediate size cars, wheels will be easy to get. If you go with a truck diff, GM 2wds have a 5x5 bolt pattern, as do some Caprice/Impala models, mainly police cars.
skraps-'67-'69= first gen, '70-'81= second gen, '82-'92=third gen, '93-'02= fourth gen. Supposedly the fifth ge Camaro is due out next summer, but I wouldn't hold my breath on it.
