Originally Posted by Cab_Burge
I wouldn't and don't recommend using any Pro ring and pinion gears on street or street and strip car down
They're to brittle and won't live long on the street down scope twocents


It's the other way round, street gears are hard tempered and brittle. Pro gears are soft and wear out quick.

https://www.dragzine.com/news/do-you-need-street-gears-or-pro-gears/

'74 Challenger..9.46 @ 145.9 1/4, 6.001 @ 118 1/8 so far. 4023lb !!! # N/A, Marsh performance 655ci, Indy Maxx, T/R, Indy 600-13 X's, Street legal, pump gas, full interior, Cal-Tracs, mufflers, 3:73's and real 10.5 radials.
9.51 @ 142.4 1/4, 6.003 @ 114 1/8 with our old mule KB, 572-13, 580 wedge.
RHD '68 Barracuda Fastback 323ci street/strip. Best ET 13.88 @ 99.03