8 3/4 hardware?

Ok might be a stupid question but ill be damned if i can find it,and the local dodge dealer aint worth a **** latley. I bought an 8 3/4 from a vendor at mopars at the strip several months back along with a third member thru the local want ads.....but i never did get the hardware that holds the third member to the housing.Does anyone know the thread pitch and size of said hardware that holds this heavy sob to the housing by chance? or know of some place that might carry it? i've tried the local dealer for a 72 a-body but it was the wrong size.....any help would be appreciated.


TIA