Throttle pressure linkage (kickdown) 6 Pack

I have a 340 6 pack that I am putting into A body and have been told that I would need to use a cable linkage because the 6 pack linkage is only for an E body and is solid and will not fit in an A body. Has anyone run up against this? Could you modify a 4 bbl to work or is a Lockar cable the way to go??? Any pics would help Thanks.
We have a 340/6-pak on the 73 DS we just got. Everything is working great except for it being geared to low. When my son gets home I'll take a pic and post it.