i get a record 8.5 mpg lol. 6.0, 80e, Nelson tune. When i install the blower and cam i wonder if ill get less or more

 

thats a big damn truck though. what size lift and tires you got there?

 

for whatever reason 6.0 liters just use more gas than 5.3's. I would stick with a 5.3 you don't gain enough hp or torque to justify what you lose in gas mileage.

 

hahahaha the lift is an 9 inch CST, new torsion keys turned up an inch and a 3 inch body with 40" toyos on 22x12 weld velociti's with 4:88's. just trying to piece everything together for the motor now
actually this picture is before the 3 inch body lift