Calibrate your OBS speedometer

I used a DRAC when i went to the 1994 dash with a tach. The DIP switch is cool. I have the original DRAC2.pdf file from diy-efi.org before its servers crashed years ago. It full of some good stuff. Here is a repost of the article to swap gauges in 88-94 dash. FSC Forum - View Single Post - Update to 94 Gauges(w/tach)