Thats what I was thinking, there is a guy on PT with a 5.3 in an s10 with a 212/218 cam getting 20+mpg around town. I think highway mileage would be awesome with a t56. As far as gas goes though after I have been there a year they will pay for my gas and the commute to the project I will be on is only about 10 minutes in traffic so gas cost isnt a big concern. Eventually the little truck would get a forged 5.7 built out of the 5.3 out of the Z71 but that would be a while. I dont know what to do though. The thing i hated about working on my truck so much was it was my only transportation if I wanted to go see my family or whatever out of town but with this stuff I would have the other truck to still ahve the freedom to do whatever I want so if I broke something on the colorado it wouldnt be any big deal jsut fix it when I get the chance kind of thing.