7M5 are '72 455 4 bbl D port heads std on SJ GrandPrix or Grandville engine, not 455HO heads. Your date code on them appears to read I011 aka Sept the 1st, 1971. '72 models started coming out 3rd week of Aug 1971. Unfortunately, next to no demand for these heads or 7L4's or 4X (big chambers) or 5I's.
__________________
Buzzards gotta eat... same as worms.
|