I have a 14:1 from a WS6 T/A on my GTO. I ran it for a few years with the Firebird internal stops and had no issues. I recently had it rebuilt by PowerSteering Services and they removed the internal stops and ..... well ..... I still have no issues.
With the T/A 1.25" front sway bar, 7/8" rear sway bar, the Energy Suspension bushings, Bilstein shocks, Formula steering wheel and T/A steering box the GTO now has a decidedly more modern feel to it and rides better also.
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frittering and wasting the hours in an off hand way....
1969 GTO, 455ci, 230/236 Pontiac Dude's "Butcher Special" Comp hyd roller cam with Crower HIPPO solid roller lifters, Q-jet, Edelbrock P4B-QJ, Doug's headers, ported 6X-8 (97cc) heads, TKO600, 3.73 geared Eaton Tru-Trac 8.5", hydroboost, rear disc brakes......and my greatest mechanical feat....a new heater core. 
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