[dbear]

Does anyone know what the factory size wheel specs are? Looking for width, backspacing, etc. I am guessing that they are 14 in diameter? Thanks in advance!

 

[Bearhawke]

14" x 5.5" were standard, 15" x 6" were optional on police vehicles. I'm not sure on the offsets.

 

[valiant67]

There probably were three sizes offered: 14x5,14x5.5 (probably the Road Runner) and 15x6 (probably Hemi only). Those are the 1969 options but 1968 was probably similar.