Gear Vendor/Gear splitter

Problem with them is they don't like lots of torque run through them backwards. So it you have an exhaust brake you shouldn't use them.

Or maybe an Eaton 10 speed conversion swap?

I bet its very expensive?
But how cool would this be!

https://www.youtube.com/watch?v=F-vgxhMv1Cc

I've pretty much sold all the other toys I use to through money at so........?