Nice Chevy!
I had a GMC van (2wd). Good alternative to Ford or Dodge.
Good motor and Chevys steer better than Fords IMO.
I had a chock inside for a sportbike.
Yours looks great!
You should be able to do larger arched leafs (custom I would guess). Of course then you will have to attend to steering geometry, maybe lengthening drive lines etc...
Make sure it is a full length add a leaf if you go that route.
Here is my interior for comparison.
Sadly my van was totaled in a horrific accident.
Keep after it!