I have what I believe is a 70-72 Olds 8.5 in my '66 GTO.
It is definitely an 8.5 (every piece of the thing has been replaced, and all of the parts are for an 8.5), no C-Clips, was originally 2:73 open.
Fits like a glove.
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'66 GTO convertible. 462, KRE 290 cfm Dports, SD "Old Faithful" hydraulic roller, CVM ported aluminum Tripower, TKO600, Moser 12 bolt
"I open up three deuces, I'm Never Coming Back!"
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