|
Automatics? are you sure?
Because those wouldn't have come with either of those front-ends.
The '77 is probably a Dana44 and it should have had the normal Spicer hubs.
The '80 would be a GM Corporate front and in '80 most of those were "full time" four wheel drive with NP203 transfer cases. At least the automatic transmission units were and 4 speed Blazers were rare then. So that would be the drive flanges with the flat covers.
If it really has the automatics, someone went to some bother to change the washer in the wheel-bearing nut set..........or they wouldn't work anyway.
Either way, the Warn or MileMarker hubs should do you fine.
|