they disassembled the 6L80e 3 times completely to change the output shaft.
The day before yesterday they finally got everything now to put it together.
They were really a bit mad about the fab guys who did the shaft ... the transmission consists of 1000s of parts ... and needs
to be sealed, oiled, new gasket and so on, each time of disassembly...
Good news so far for other things :
Hishams idea is to keep the stock engine mounts and all other mounts (transfer case, gearbox and so on ) exactly in the same place and don't do any welding on neither the mounts nor the frame. He will fab brackets, which will be mounted on the gmc side (on the mounting points) and exactly fit into the stock engine mounts. The mounts are strong and good enough for this.
This way also the stock rubber will still remain there.
Also good : the transfer case will be in the exact same place as before - so no problems with driveshaft length and so on : i can still use all aftermarket parts
(yehaa i can spend more money 
) . For the rest of the enforcement :
I'll plan now on getting an old F150 rear axle and let them shorten it so it will have the same width as the jk - and of course let them weld the brackets into the right place.
The old F150 is a Dana 60 axle
- so this should hold it up. For the front axle i'll let them reinforce it with steel and inner sleeves and gussets. Maybe in addition a chromology axle. If that is not enough and this axle will bend, break whatever. I'll get a pro rock Dana 44 and reinforce this.
I'll leave ring & pinion unchanged for now - because i've a very low 1st gear as well (4:1) ...
Later on the final plan is to get a higher lift and bigger tires.
!