OPH, thanks for the history lesson. As many diff's as I've set up thru the years most have been plain old 8.5 "C" clip variety, a few 12 bolts, and a few later 7.5's. There were transitions years between 8.2's and 8.5's but I thought that the 8.5's were pretty much the "standard" by 1973.
You mentioned someplace about 1977 half ton trucks getting 8.5's by 1977. I've seen 12 bolts diffs as late as 1979. Did they overlap for a few years like the 8.2's and 8.5's in the early 1970's?......
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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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