Thank you all for the replies!
go-fish, how old is your kit?
Replacing the axles with ones that have a Chevy bolt circle would be a little sacreligious, but
very practical for getting a wider selection of wheels.
I've had repeated problems with loading the
RMS site, so I didn't think to check it again.
Seems like a 8" wheel will work up front.
Stock rear end though, which I don't know the limitations of (but I
do understand that changing to an Alterktion on the front won't change anything on the rear
), but after some searching, I believe that 8.5" width should be fine, but I'm still in the dark about offset, and how much BS I can have. The 18" wheels I'm looking at for the rear have the choice of 6.125 BS and offset at +35.00mm, or 5.750" BS and offset at +25.00mm.
Would any of those be ok?
The gearing is 4.10, so a little height on the rear tires would be good, right?
Rear tires I'm thinking 275/50/18 = 28.8" height.
Front: 245/50/17 = 26.6" height.