I have 65 chevy shortbox fleetside and I installed muncie m-20 4 spd in it,,does anybody know what speedo cable will work with this set up?original speedo in dash, saw one on ebay it said,(5/8 18 thread on instrument side and 7/8 18 thread on tranny side,65 or 83 inches long,is speedo 5/8 original on speedo and is muncie m-20 a 7/8 on tranny? thanks for any input,its a 350,
