If you have a auto get 4.10s. If you have a standard the option is yours. You will burn more gas on the interstate with 4.10s on a standard. You will burn more gas period. But the difference is noticeable as the rpms climb.
8.8 10-14% faster/ 5-6% more gas
8.8 with 3.73-4.10s 20-24% faster/10-12% more gas
Basically the gears keep you in the powerband
new engine,1.7 rocker arms,Pipes exhaust, shorty cats , shorty headers,under drive and overdrive pulleys,4.2 upper plenum, throttle body spacer, cold air intake, stage one clutch, shorty shifter, and tune. 8.8 in storage