Reg Hinnant had shared some great info he put together a couple years ago when we last had a major shock discussion. Here's what he had...

Hi Joe, I want to share what I have researched on the 7100 shocks. It may save you a little time.
I am basing this on an unlifted VX but I believe you would be concerned with the same collapsed spec's with a 2/3" lift.

Rear shocks
Original VX ext=19.25" col=12.56 eye to eye shock
AK7108R ext=22.29" col=14.06 eye to eye shock
Extended position is approx 3" longer. You may need extended length stop added to prevent rear spring from falling out when fully extended. 2/3" lift may be OK.
Collapsed length is approx 1.5" longer which will be close but should work with our bump stops being the size they are. I have not got under the vehicle to measure this yet.
This shock does not come in a "short body" version that would reduce the col length but the 10/12 &14" does.

Front shocks
Original VX ext=15.35 col=10.24 stem to eye shock
Class 11 front ext=18.58" col=12.00 stem to eye shock
Class 11 rear ext=16.22" col=10.86 eye to eye shock
My measurments show the the class 11 front too long collapsed and it would bottom out before the bump stop would.
I believe the class 11 rear with the adapter possibly would work as long as the rod to eye adapter did not extend the length. I would need to assemble a shock & adapter to know for sure
The part # for the class 11 front is B46-1085R.
The part # for the class 11 rear is B46-0930R.
All of these are the 7100 series with all valve settings available.
They come with reservior & reservior mounting hardware.
Best online price is at jack-it.com & offroadwarehouse.com
Also, Independent4X suggests that you contact them for fitment to your particular application. As they are a Bilstein dealer and do a lot of Isuzu mods that would be good and prudent advice to follow.