I don't know. I need to finish the cable adapter at the shifter, modify the trans linkage I built for the original cables, and finish the cradle end of the front trans mount. Then I need to pull the trans again since I didn't realize there was an potential issue with shimming that needs to be checked and it should be done. The fabrication should be done in a couple weeks, weather being a factor.
The cables are a heavy duty universal type, with plastic liner and stainless ends, designed for very long runs with low friction but at 72 inches, but only cost about $25 each.
The cable adapter slides into my 4 spd shifter without modifying the shifter (though a 4spd shifter needs a couple unrelated parts removed anyway to be used with a 5 spd).
The system makes it a shorter throw without shortening the shift lever/handle.
The rear mount bracket uses the fiero mount, is drop in, and can be removed easier than the original bracket imho.
The front mount uses the original but slightly modified f23 mount, a small flat bracket with a spacer, and a bolt on cradle bracket to make it easier to work on.
The most complicated part is the trans linkage that replaces the arm on the shaft. Sane basic design as the stock f23 bits for shift and select.
I have a different approach on determining the correct shim to use also.
I've seen custom systems where some folks have had cable overload failures. I'll show how to set up the system properly so that cannot happen.
All in all, just a fresh approach by an old guy with a carb...