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4.3 is the perfect answer for the S10 series/Astro van but somewhat under powered in a full size (still not bad though)... BUT a 4.3 in a full size truck with 4x4? we have a saying for trucks like this in the shop, Gutless wonders. No offense to folks who have these but if I were looking at a 4x4 fullsize? a 4.3 v6 is the last thing I would want to see under the hood. Stock (if I remember correctly) these engines produced 171hp with the tbi version. cpi didnt come out till later....
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