[68Timber]

I wouldn't say re-gearing is not worth it, it's just expensive. I had a C2500 crew cab with a small block once that was lazy. Swapping from 3.73 gears to 4.56 gears totally transformed the truck. You're looking at a grand easy to re-gear your Burb front and rear but it will make a big difference if you're running 3.42 gears now. Like Jeff said, pull the cover and see what you've got.