I need to find what you guys with stock electronic speedo's are using now with your TKO500 or TKO600. I posted the same question in DIY Prom but thought this might be a better forum. I'm trying to hook up the speedo pickup to my stock 91 Z28 harness.
https://www.thirdgen.org/forums/diy-...ec-speedo.html

 

Call Forte's and order his adaptor. It will let you use your sender with a Ford speedo gear. Might want to order the correct tooth gear at the same time.