where to find 8.75 sure grip units used

In most cases a mid 70's 4 wheel drive truck will have a 3:55 to match the Dana 44 front axle ratio of 3:54. Another often overlooked source is any big C-body car with a big block motor, most times from 69 or earlier. I have a few sources to try if you'd like me to check here in Michigan. I know of one 3:23 SG in an E-body housing right now just laying on a pile of rearends, and the whereabouts of a couple C-bodies that may have one. Geof