Overkill or no?

I would totally do it, but the max I can go with this truck and the new 45T would be
13.2, 40, and 60
So 113,200 is it. Which will be around 70k load limit. Seems the only way to increase that is either go to a 14.6 or 20k front, and a 46k rear.... or add a lift axle.
I'd love to do the a 20k lift and swap in a 3.7 or 3.9 ratio. But I figure that's about $20-25k?
You're right I dont really care to every get above 150k gross. Just didnt know if my setup would be able to handle 130s.

 

Idk. My 2018 is pretty aweful... lol
I'd really like to do a d16 VNX or an old t800 with c15, like 2005-7.

 

Nope. That's my last 6.

 

How hard is it to pick up the shifting techniques for the split ratio rear ends or the auxiliary transmissions?

 

Just found the meritor breakdown, they are

275wb or 280, I cant remember.
I figured $20k for lift axle and new gears, and installation... sound high?