Less rollers = less contact patch which REQUIRES more wear resistance
Chicken versus egg, but certainly clear that the hardness was an issue with the components used and like Barry said, I would have to assume they purchased those components on dimension not application.
![[linked image]](../../../../../../img262.imageshack.us/img262/3613/smalltreevo7.jpg)
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- 70 Fastback Mustang, 489 cid FE, TKO-600 5 speed, 3.70 9 inch
- 71 F100 shortbed 4x4, 397 cid FE, headers, Street Dominator, 280H, 5 lug Dana 60, 4 speed
