any 60s truck stepside guys running big tires with factory 12 bolt?

[Super73]

I ran 315/60/15 MT ET Street radials for years. Over the last year I have been playing on a set of the new MT ET Street R bias plys in a 32x17.50, these measure out to be the same as their 32x14.50 ET Drag and are on the same M5 compound. On a decent to good track, I would take the radial as it is faster, but for the marginal traction no prep deals I have been doing, the big tire is much better.

I used to run factory truck arms. Switched to a 4-link when we caged the truck 4 years ago.