Question on Speedo Cable

[oteixeira]

Hey all,

So I bought a set of the Dolphin gagues (cheap, good looking, hope they last) and made a custom little enclosure for them. I went to hook them all up only to find the speedo cable isnt even a close fit. I was told that someone may make an adaptor so I check, no suck luck. Anyway, what I have in the C-20 is the small radius (not even 1/2 inch I would think) push on type cable. What I need is something closer to a 1" screw on, and oh, buy the way, it is hooking to a TH350 tranny on the other end. Anyone have a clue what I am looking for here? Is there an easy part number I can order, or do I need to take my speedo down to Napa and pray they have a match.

Thanks,

Orlando