Never tried them or saw the need for an upgrade in that area. There are a few places in the TH350 and TH400 to use a wider bearing and I suggest that upgrade where it applies. The OEM long center support bushing had a babbit coating and many would show considerable erosion of the material in really high mileage units. A coated or harder surface bearing wouldn't be a bad idea in that location....IMHO.
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73 Ventura, SOLD 455, 3740lbs, 11.30's at 120mph, 1977 Pontiac Q-jet, HO intake, HEI, 10" converter, 3.42 gears, DOT's, 7.20's at 96mph and still WAY under the roll bar rule. Best ET to date 7.18 at 97MPH (1/8th mile),
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