I have three of the 15x7 wheels, and four of the 15x8 wheels. I would have been in good shape for my 78 LRT, but I just picked up a 79 LRT, and it needs four 15x8 wheels. I will have to find two more 15x8 wheels. I understand that the 15x8 wheels are easier to find because they used them on other Dodge trucks besides the LRT trucks, where as the 15x7 wheels were LRT only pieces.
StreetVans came with 15x7s. I've also seen 15x7s on boneyard RCs but who knows how they got there. I'm pretty sure they were both optional from the factory on whatever truck ya ordered. Oddly enough I recently picked up a pair of 15x8s.
