Re: V6 in a 1970-72 Jimmy?
GMC actively marketed the V-6 as a replacement for large gasoline engines in other makes of trucks. Catalogs and spec.sheets exist for some of the more common swaps. One in particular that was pretty common was the 351 or 401 into the White 3000 series cabover. The old White flathead sixes were reliable but not efficient.
OHC Pontiac 6 into a GMC pickup would be interesting
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