I think TomR was the first but using a Ford 2.3 SVO (I think) bellhousing and S10 tailshaft. I was able to watch the
progress of Cabc26's T5 install at a local shop and that inspired me to move forward on mine. I
already had the RWD bellhousing; just needed a kick in the butt to get started
Speedo output on the tailshaft is irrelevant because it's plugged, I use the Speedhut Speedbox mounted
in the glovebox to drive the oem speedometer. I prefer to mount it with more of a straight shot (for the
cable) to the speedo, like 1 owner69 did, but I'm going for oem / stealth look.
I'll take this further. My gearbox mount is using the oem mount turned backwards. Hopefully
the picture can depict this. No exhaust yet. Because the tailshaft mounting holes are up against
the frame tunnel, I made a mount that 'cantilevers' forward, then the oem mount mounts to it. There
are rubber pieces in between the two. The cantilever mount is 1/8" steel with two ribs for strength.
We're going off the rails a bit here but to answer the op's question, although the TKX box is smaller,
it's not an advantage that I can see, as long as the T5 fits.
I should probably start a thread with the trials and tribulations with this mod