Re: L-78 Motor and auto trans
Weren't the 840 heads a smaller exhaust valve (1.72) than a 291 head (1.88)?
If that were the case, as I think, then that motor with 2 different heads would be a little lopsided in power output from side to side. Probably not enough to notice though.
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Rick
69 Chevelle SS396 Silver L78 M21 Post Sedan (Berger Chev.)
69 Chevelle SS396 Black L78 4-speed 4.10 Post Sedan
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