What Mods Do I Need?

JirehCustoms · March 24, 2011

I have an early 90s 350 and auto trans out of a Chevy 2500 utility truck. It was a good running driving truck when the motor/trans were pulled. I want to put it in my 95 GMC 1500. What mods do I need to get 20+ mpg and as much power & torque as possible with that fuel milage. My 95 currently has a 350 and auto trans with 223,000 miles. It runs good. It is just tired. I want to build this other motor and freshen it up to bring more life to my truck and my wallet.

Any good advice is helpfull.

becker87 · March 24, 2011

20+ mpg? Good luck with that. With my 94 silverado with the 350, best i ever achieved was about 17. Your gonna need some pretty tall gears, a very efficient free breathing 350 and some smaller/skinny tires for lower rolling resistance, and keeping the weight as low as possible. Those are all things that will help your mpg, but 20+ will still be hard to achieve.

JirehCustoms · March 24, 2011

20+ mpg? Good luck with that. With my 94 silverado with the 350, best i ever achieved was about 17. Your gonna need some pretty tall gears, a very efficient free breathing 350 and some smaller/skinny tires for lower rolling resistance, and keeping the weight as low as possible. Those are all things that will help your mpg, but 20+ will still be hard to achieve.

20+ is possible. I met a guy that had a 93 or 94 and was getting 22 with a 350, but I don't know what mods he had. Any improvement on the 12/13 I am getting now would be good. 17/18 would even be great.