Quote:

ok, so these never came factory on any cars, mopar, ford or GM?




No - G60-15s were the largest factory installed 60 series musclecar tires "back-in-the-day"

G60-15s on:
'70 Trans Am e-bodies (rear)
'71 - '73 b-bodies
'70 - ('73-'74??) Buick intermediates (GS GSX etc.)
('73-'74??) Pontiac intermediates (GTO Grand Am)

& that's it!

Here's a couple H60s that were planned for the 6bblgt, but I don't think they'd fit the stock wheel well.