Coil spring '73-77 A-body/'77+ B-body housings had inboard shock mounts as part of each lower control arm mtg bracket. Earlier A-body rears had outboard shock mounting. The oddest outboard shock mounts were on 8.5 A-body housings used on the housings in VistaCruiser wagons.
It looks like someone has crudely cut off that area on each of your lower control arm mtg brackets, that makes me believe it's a '73-77 style coil spring housing that the shock mounts have been modified.
The spread between their upper control arm perches on the '73-77 housings is several inches wider than on all the earlier A-body rears. I once ran across a '70 ElCamino where the frame crossmember area where the upper control arm mounts, had been cut out, & a section cut out of a '73 & later A-body had been welded in. The other fit problem with the '73-77 A-body rears is they are little over an 1" wider than the '71-72 8.5 A-body rears. With the factory drums installed, the width of the '71-72 8.5 A-body rears are 61 5/16". '68-72 10 bolt & 12 bolt "Chevelle" rears are also very close to that width with drums installed.
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Last edited by 'ol Pinion head; 08-05-2024 at 06:14 PM.
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