Re: running hot
The sbc engines have only heads (there is no left/right distinction)
That said the only differences might be if the older heads don't have all the accessory bolt holes in the head ends like the newer ones do.
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 1970 C10 LWB 350SBC, SM330 Muncie (not saginaw SM326) (on tree), 3.07 open (assumed), PS, PB, Idiot lights
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