Quote:
Originally Posted by fast68
91-96 is virtually identical to the 78-90
78 is technically the new year although the 77 body is the same on most models of b body
77 and 78 were changeover years and kinda odd
some changed for 77 and others didnt til 78
even on the same platform
if you look up brake parts and some other chassis related parts they differ 77 to 78 on the same models/platform
very confusing
most sources list 78-96
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I'm not sure what sources you're referring to, but all B-body cars changed to the "downsized" platform in 1977. There's no ambiguity about this. The lighter duty versions used the same 4.75" wheel lug circle and small brakes as the older A-body cars. The heavier duty versions (wagons, police, taxi, etc) used 5" lug circles and bigger brakes common to the 71-76 cars. Coil spring diameters were common between the 71-76 and 77-up cars in some cases anyway.