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Old 03-11-2014, 10:31 PM   #6
brad_man_72
the boat guy
 
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Join Date: Jul 2007
Location: springfield mo
Posts: 2,339
Re: C10 Build - what's the latest/greatest swap for best mileage?

5.3 4l60e 3.73s 17mpg pulling my boat 70mph. Plenty of fun, cheap easy and proven swap, runs the quarter in 14.7 seconds.

If money is no object you could probably swap the entire drivetrain from a new prius.
If you really don't care about power a diesel from a forklift would probably get really good mileage.
If you just want to save money a tune up on whatever you have is usually the cheapest route, depending on how much you drive an engine swap can take a long time to pay for itself.
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67, swb, fleet, tach, throttle, 5.3, 4l60e, 3.73's, fuel cell, 5 lug, p.d.b., 4-6 drop. great little truck
66, stevens drag/ski 18' silouette, 350, 2.02 doublehump heads. comp extreme marine 278 cam, vette 7 fin valve covers, old polished edelbrock intake, velvetdrive, casale v-drive, adj cavitation plate.
28, model a rpu project,
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