After my 4th angle drive died on me I decided to take a different approach.
I ordered one of these:
https://www.speedhut.com/ecommerce/p...peed-Converter
w/ the GM style Clip on cable.
the price is a little steep, but so is buying a new angle drive every year, just to have it break after 2000miles.
Installation was very easy. It could be mounted where the lambda counter is, I chose to mount it on top of my evaporator box.
The speedo cable snaps right in. I mounted the GPS antenna on top of the radio bracket (out of sight when the console is installed). It only requires a switched power and ground so those were tapped into the 12V outlet circuit. There is an additional VSS output that can be used to drive a cruise control unit, this is a problem with installing cruise on a delorean, you have to put those cheesy magnets on a driveshaft.
All in all I am very satisfied. The speed can be calibrated so it reads very accurate, more so than stock.
Hopefully this helps someone else out!