I'll look into that for sure. At worst, maybe they could adapt a GM TH350 sender to mating to the speedo output on the transmission. Does anyone know why hooking up a GPS sender wouldn't work. This looks simple and reasonable:

https://m.summitracing.com/parts/izl-s9020?seid=srese1&cm_mmc=pla-google-_-shopping-_-srese1-_-intellitronix-corp&gclid=CMOLk9Sg-NICFRBEfgod18IPhA

Will my speedometer be compatible with the signal this thing puts out?