72 c50. And yes I got the factory cable with the inline adapter for my speedometer from the donor truck. But like I said the cable isnt spinning at the right speed for my dash to be accurate. It works and everything even when I switch from hi/lo it changes so it's working just not turning at the proper speed. Which is why I'm thinking that gear that turns the cable isnt the right size(like tooth count). When in driving in 4th gear hi range on the highway I'm driving about 55-60mph my gauge reads 30mph. I feel like it's not to far off in lower gears but once I get into fourth gear it gets to be like 15-20mph off. However the donor truck did have a different transmission in it, I believe it was a spicer 5 speed. So whatever the gearing is in that they changed the tooth count on the speedo housing piece for accurate speed gauge.
