how to get better gas milage?

[billk]

I bought my 88 C2500 5.7L 700 r4 tranny in the beginning of June..I flew to where it was and drove it home with nothing in the bed
( about 300 miles) I drive very conservatively and it averaged 14.5 mpg
Once home I changed all the fluids, inflated the tires to factory specs ( 45 front, 65 rear) gave it a full AC Delco tuneup, changed the O2 sensor, installed a stage 1 Jet performance computer, installed a throttle body and injector spacers..
I loaded it with about 600 lbs of tools and
then drove it 1500 miles to my brothers house in upstate NY..
The truck averaged 17.5 to 19.5 mpg depending on my speed and the use of the A/C
I cannot put my finger on any one improvement as most beneficial but all combined I was more than satisfied..
Bill

[Lexluther]

I think u should have stayed injected! I get real close to 20mpg, around where i live, and better on the highway! the previous owner, who bought this truck new said he could get 24! if thats true i have never saw a carb get this..

Originally Posted by brad4eva

AFF!!! what kinda gas mileage u think i would get? how much diff betwen 2 barrel and 4 and lets see what all do u think i should do 4 more gas mileage ? hmm what gas should i run in that motor? what about geting that carb adjusted for best gas mileage? wat u think? and wat u think abot my lil project truck xD