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Old 03-05-2026, 05:23 PM   #3
LS short box
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Join Date: Jun 2015
Location: Carlos MN
Posts: 2,591
Re: 4BT Cummins

My .02?
Not knowing what your long term plans are for the truck anything but Chevrolet SBC/BBC or LS engine the 4bt is going to kill the value of your truck.
A properly built SBC will sneak up on 20 mpg with a OD trans. With a LS you can get low 20 mpg with a OD trans. My 68 C10 with a LS6/T56 swap 20-22 mpg on the highway day in day out.
Again just my .02.
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