Want to order new gears, stock 3.42's just dont cut the mustard. If I go 4:10's what DR could I run? Its mostly gonna run on the stock 20's or 22" ck375's with 275/45's. Its gonna be N/A mostly maybe and thats a big MAYBE a 75 shot down the road....

 

It might be a 3.73 and a 28" DR for track days and trips to mexico....

 

You don't want 3.73s if you already have 3.42s; too much money for not enough gain.

 

Im thinking maggie since Im about to install a ls9 cam

 

I wouldn't even bother changing your gearing if you're looking to build a torquey TVS engine. The high-stall converter won't make a hell of a lot of sense either. The LS9 has a wonderful powerband that needs a 3200rpm converter and low gearing to take advantage of it as it lacks low-end torque; a TVS setup will be the exact opposite.

 

Its not a drag truck just a quick DD and I dont want 2600+ rpms while running down the interstate

 

If you dont drag race it, keep the 3.42s. Anything higher esp. on a 28in DR will hurt your top end ALOT