I'm doing some research for my current swap, a Gen 3 V8 into my 1998 Durango (originally a 5.9 Mopar Magnum) as to what engine to buy for the swap. I figured this would be a great place to get some real life experiences from those with a gen 3 turbo.
I'm rebuilding a 4L80 due to the weight (about 5100 #) of the truck, and for when I may do some towing with it. The truck has 3.92 diffs and is 4WD. I am leaning towards buying a 2003-04 LM4 (aluminum block 5.3) out of a Trailblazer due to local availability along with low cost and weight but am still open to other options (4.8 or 6.0). Since I'll be commuting in the truck 60 miles a day, I want to build it for decent MPG. Unlike my prior car swaps, I'm not as interested in going fast.
There seems to be some debate over MPGs for NA vs turbo trucks, so I thought I'd ask here for anyone that has some real life numbers for a turbo truck.
I'd like to get the following data:
Year/model of truck
Engine size & mods (such as cam, heads, injectors, single/twin turbo, etc)
MPG city/highway or average
Thanks for any input.