Edit:
Future person, the one linked below will only work with a Marelli throttle not a Lucas. I Learned the hard way.
Do we know if this one will work for my 85 HE?
https://www.oreillyauto.com/detail/c/masterpro-ignition/fuel-delivery/fuel-injection/throttle-position-sensor--tps-/0164da5f35ef/masterpro-ignition-3-terminal-throttle-position-sensor/mpi0/29968/v/a/5471/automotive-car-1993-ford-mustang
I found it on this forum post.