[kyleb]

I had a similar situation on my 87 with the 8v92. The throttle on mine is air & the actuator at the engine was a bendix unit that was basically an air cylinder with a flex cable attached that connected to the engine. That actuator assembly began reacting with more & more delay.

I replaced mine with a Williams WM388 throttle control cylinder and a bunch of custom fabricated mounts & brackets.

The factory cruise control no longer worked, so I installed a King Cruise unit (sadly, they are no longer in business).