is yours threaded in some form? mine off my '84 700r4 is.. and from looking yours is an '86 which the cable is the same from LMC, manual and automatic trans. cables are different however
i don't know if this helps but lmc sells an upper and lower cable for an auto $15 and $20 respectively... linky
http://www.lmctruck.com/icatalog/cc/full.aspx?Page=49
the manual trans cables are in the link too