I ended up replacing the original linkage with Lokar's Mustang specific cable throttle pedal (Midnight series) and ran it to a short piece of aluminum "L" stock that I bolted the under side of the Offy adapter's mounting studs (under the log). It put the cable at the perfect height for full motion of the linkage, had just enough clearance of all moving parts and ended up looking really clean. Now,this only worked because I have the offy made for the earlier heads, but I'm sure you can come up w/a mounting point with the later versions.
Jay