Why would a v8 bell housing be so rare? Even if it’s a t5 the truck is 4wd.
All has to do with supply and demand.
That transmission is a $400-500 core, and rebuilt is a $2500-3200 unit. And that's not counting the bellhousing.
It is what it is. Less trucks, lots of the ones built were 2.8s with the 60* pattern, people want that normal pattern stuff to swap to v8.
End of the day, each project needs to be worth to you what you put into it, that's all that matters. $1000 out of pocket for a rust free 4x4 MT 1st gen? If I were in market it'd be a done deal for me, but, not in the market either. Too much junk, too many projects sitting.