Quote:
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Originally Posted by ryanbobb77
Block casting #3970010
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The "CMJ" suffix is:
Code Year CID Vehicle HP RPO Trans Carb Comments
CMJ '75 350 Impala 145 L-65 TH 350 2-Brl A.I.R.
CMJ '75 350 Chevelle 145 L-65 TH 350 2-Brl A.I.R.
CMJ 80 305 Impala 155 LG-4 TH 350 4-Brl
CMJ 91 350 Cadillac 185 L-05 700R TBI
Combined w/the casting number 3970010, which is:
350...69-80...2 or 4,
this is a 1975 350 from either an Impala or Chevelle.