Re: SBChevy Engine Types
All that stuff happened in 86-87, but not all engines got roller lifters. My 87 truck motor had a 1pc rear seal, roller lifter spider bosses (not drilled), the goofy intake bolt angles, centerbolt valve covers, and a tiny little flat tappet cam. It also had a crack, but I don't think that was factory.
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~Pete
1970 Nova
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