A 1974 Duster - My 2nd one, 41 years later!

Electric converter thing, by AutoMeter. AutoMeter Programmable Electronic Speedometer Senders 5291

680125BB-7E7E-4332-9CCE-CFAB7C80D535 by Alexl5280, on Flickr

IMG_5353 by Alexl5280, on Flickr