[dave69]

Originally Posted by 69GMCLonghorn

You'll have to spend thousands... no point!

Seriously, though, let's think about it. Brand new trucks today aren't even getting 20 MPG. They advertise 20 or 21, but real world is more like 16 - 18 in most cases. With our trucks, the main thing to work on is dialing in the gearing. Most are taching too high on the highway and use too much gas. If you add gears or change the rear end gears, you can make some decent changes in mileage. But unless you get hooked up with a lucky junk yard find, you'll be spending quite a bit to do anything that will net you a noticeable difference.

You've got it running as well as you can with the parts you've listed. The TBI won't do squat. I'll take a 600 Holley any day. It's a 40 year old truck. Just drive it easy and enjoy it. I mean heck, you don't have payments, right?

What gears should I look for 3:73?