New Drive Train

Top of the morning fellow truckers and trucking enthusiasts! I’m currently about to start an extensive project of changing my entire drive train on my truck. Currently it’s a 2001 Peterbilt 379 Shorthood that came with a C-12 motor, Eaton 13 speed and 3.70 rears. I found a 2ws with a factory rating of 475 core I’m about to get fully rebuilt and bumped up to a 600. I’m thinking of getting the 2050 clutch and mate it with another 13speed transmission. My question I’m guessing is the rear end ratio. I currently have 3.70 rear ends that have my rpms around 1500 at 66 mph. I’m thinking I should go 3.23s or 3.36s. I have standup 11r22.5 tires and I run 99% of the time between Central New Jersey and Florida pulling 41-44k lbs. any input would be greatly appreciated. Thank yu

 

Any advice would be greatly appreciated

 

I am currently run 11r22.5 tires. I was thinking 3.36 myself