Speedometer cable length?

Ok, Y804 is the cable you need, here is a summit link. It is made by ATP Y804 is there part #
http://www.summitracing.com/parts/ATP-Y804/

We are still having issues with dads speedometer, but have to figure it out. When you get the cable, you may need to trim/shorten the end that goes into the speedo, as it would "bind" on the speedo and stop it from moving. Rockauto customer service sucks!!