Also curious about those trucks. Did you find them in an attic or something? That set-up seems like it was finely tuned in a laboratory somewhere to appeal to slap peeps.
Back in late late 80s or early 90s when grind king sold just their inverted kingpin, I would use those in my indys, so I've always loved that concept. I'm a bit of a hoarder, and found the mother lode in rubber maids in my parents basement. Old Stage Vs, VIs, and VIIs, cross bones wheels, shirts, old magazines (anyone remember power edge?), tons of stuff that i had forgotten about. So now there's a shrine in my basement!
Any Indys that are VIII or earlier are easy to swap out to grind king/krux inverted, since they still had the old kingpin bolt with hex head. Just hammer it out and slide in the new nut for inverted, no spinning nut issues.
I also just started running a blank deck that's same size, has same wheels, bearings, bones bushings, etc as this set up. Only difference is it has stage XI 144s, to see if there's a big noticeable difference between VII and XI geometry. Honestly can't really tell yet, but will keep you all posted! (I should move this convo to the truck set up page....)
Thanks all, and looking forward to adding more photos + info and getting feedback + questions!