67 accelerator assembly ?

[72frmtrk]

Can someone tell me what the accelerator pedal mount and assembly for a 67 cab consists of? I bought a rust free 67 cab to put on my 72 and all I got with the cab was the parking brake lever and the steel lever that the linkage hooks to. The plastic block with the three holes that the steel lever snaps into came with it to. Something else must be missing because when I try to put the plastic block on the firewall the lever wants to hit the firewall and the top of the lever is to far to the right for the cable or linkage to line up with the hole in the firewall. Did 67 trucks just use steel linkages or did they use cables also? I'd like to figure out a way to use my 72 pedal assembly it's alot better system.