I have the opportunity to get a spare rear end for my '67 Riv.....but it's a 3.07 posi, and mine is a 3.42. I just thought it would be nice to have a spare carrier I could swap out if I need to. Are the internal parts the same (besides the gears) or is the carrier different? If not, are the spider gears at least the same? o No:
I can't swear to it but I would think the 3-series carrier should go all the way to 3.73. I'd sure like to have that 3.08 posi to replace the 3.08 pegleg in my '68. Good find.
speed70 is correct. I just had these two carriers sitting side by side. See http://www.v8buick.com/showthread.php?t=71740 for more.