This was over on the RS Motorsports board.
http://www.rsmotorsport.c...=alfa+diff&start=0 "running an ALFA ROMEO rear end complete with discs ,4.44 lsd & alloy housing
with escort stud patern and
about 4000 kg,s lighter than an atlas or toyota rear end
this mod was popular years ago & might not be perfect but
there was a lotta good reasons to do it
& this car proves it by how quick it can be
for memory they can be a little bit of a problem in a rally car
with rocks smashing the alloy diff housing
but they were a good cheap conversion
in the early days"
There is a picture of the orange mk1 its in over there too. No idea what Alfa its out of, but like gdub said, probably a 105.