criswell87

I have an 05 gmc crew cab 5.3 4x4. I just finished putting a 212/218 comp cam an some headers an new lifters an had a efi live tune put in it.. I can tell good bit of difference in power but want get little more out it but don't want do to much more bc I drive it everyday.. What would be best it has 3:73 gears now was think bout putting lower gears or doing something with heads or putting different heads on it what would be best heads if I did

FFDP

iTrader: (2)

I don't think heads are going to help you any, you really don't have a real need to make it breath any better.

Gears or a stall converter. But gears will be spendy because you have to do both diffs.

Or drop 500lbs lol.

jiar577

iTrader: (2)

Or get smaller diameter tires, what size do you have now?

criswell87

I'm have 34 on it but I don't want go with a smaller tire

criswell87

Think I might end up going with some 4.56 gears

FFDP

iTrader: (2)

Do expect your fuel mileage to suffer with those gears.

jiar577

iTrader: (2)

With that tire regear for sure. I'd do 4.10 gears even if it's one step up from 3.73 or maybe 4.30

Honestly 4.10 is a tad too much in the highway with my 33" tires. Driving around town is excellent though.