Quote:
Originally Posted by andrewmp6
Efi alone will get you so far you need a overdrive trans to really get better mileage.If it was me i would use the tbi these trucks got later on or tpi off a 3rd gen f body and a 700r4 and regear the rear end.If you want max mileage out the truck a diesel swap can break 20mpg easy but is costly to do.
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absolutely! the pro-flo on my crew is feeding a 454 with t400 with 4:56's, hardly any diff in mileage, tbi on my stepper with od & 3:73's pullin almost 20mpg's. if you could find a good junkyard set up, i'd go tbi. cheap, reliable, easy to install/work on, but tpi is little bit more efficent, nicer eye candy too i think.