Ok, for all you guys wondering what to put in, this is a good combo.Subtle but noticeable difference. But my question is what is the break in process for this?

 

500 miles then change fluid.

 

how much should i expect to pay for 4.10s installed? my truck has 3.23s and big fat tires on 22s

 

Glad to hear that you can feel a difference. I'll be doing the same swap soon.

 

Drive it like ya stole it!
or at least i did and mine are fine!!

You are not going to break them if they are set up correctly.
IMHO

 

I paid $1230 for the tru trac and gears installed with a girdle by a well respected shop

 

I thought there was only like a 250 RPM difference between the 373 and 410?

 

It's not so much miles as heat cycles. Try and get as many heat cycles in as you can in about 500 miles. Then change fluid. Take short trips and let it cool off between them. This work hardens the gears.

I really love my swap. Same 3.73 -> 4.10. Like you said subtle but noticeable. Really fun around town.

 

on the freeway i saw like 200 rpm difference, which i probably wont even notice in gas mileage. around town though is more noticeable alot better feel. i was worried about it being too big, but i think 4.30 would even be very streetable.