I have just finished my t-5 conversion also and ran into the same problem, Does your t-5 have the mecanical speedo pinion or the electrical. Mine has the mecanical, but my speedo cable is to short, and I dont know even if it reached the trany would it thread onto the speedometer pinion anyway. And I'm kind of reluctant to get under the dash and undo it from the speedometer head side, more lazy than reluctant. has anybody run into this and came up with a solution, longer cable maybe.