powerglide speedo cable to a 200r4 ?
 

i recently installed 200r4 that replaced the powerglide in my 66 long fleetside. just refurbishing original dash gage.
not sure if the powerglide cable is interchangable !
the square internal cable fits the 200r4 and the cable end screws on but i dont like the way it matches up.
is there supposed to be a round gasket ?
because it drips fluid.
truck is not complete yet so its not running....
thanks