Wicked X said:Bad
Why would you want to put in 4.56 gears? Way to much for a 4.3
will kill your top end. These motors don't pull enough rpm's.
I use a 4.10 and it just about tops out at the 1/4 mi. in 3rd gear
with 245/50/16 Nitto drag radials. It runs 2650 @70 in od and
gets about 22-25 mpg on a trip with 255/50/16 tires.