1987 Trek XT 8000 frame with 122ish mm bottom bracket and shimano XT u-brake.
The geometry on these 1987 frames was actually designed by Charlie Cunningham, Steve Potts and Mark Slate at WTB. You can see the similarity to an early Cunningham shown in the pictures.
I can throw in the super tall TCO Piston stem too with full price purchase.
Medium-Large
21.5" c-t
22.5" tt
1" head tube
26.8 seat post