Haven't done much to this truck other than some research, but did grab some 1st gen S10 seats at the boneyard today:
These are some of my favorite GM bucket seats from over the years. I think I can leave the original seat riser in place, and build a support for these seats inside of it.
I also picked up the keyless entry setup from the same S10

... tinkering and brainstorming!
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CURRENT
'50 GMC 100 shortbed Gen IV 4.8 LS - 4L65E (Secret truck, Shhh!!!)
Build
'63 Buick Wildcat Coupe 401ci Nailhead (Very much in pieces)
Photos
'66 Impala SS convertible 327-QJet-glide (4 speed swap one of these days...)
Photos
'69 CST/10 4x4 SWB Stepper 350 2bbl - NV4500/NP241C (Broken Truck!)
'72 Sierra Grande 2WD LWB fleetside 350-TH350
Refresh
'99 K2500 Silverado RCLB 5.7 Vortec - NV4500/NP241C (Daily)
'99 K2500 Suburban 7.4 Vortec - NV4500/NP246 (still working out the bugs)
SOLD
'71 Custom/10 2WD LWB fleetside -
'72 GMC K/3500 Dually (Sold to redryder)