its easy.
basically this is what you have to do.
84-89 lincolns - mustang 5spd pedals bolt right in
90+ lincolns have to modify the top of pedal assembly, no big deal
cut a hole in firewall for cable to run (already has a stamped circle u use)
cut a hole in tran tunnel for shifter
take that aod junk out
install 5spd/tranny/clutch/cable as you would any fox stang
put in your custom driveshaft (get a one piece aluminum..like out of a crown vic or aerostar cut and balanced to 58.5" from mounting flange to tranny seal
go have fun
YES, BIG DIFFERENCE AND ALOT OF FUN.
any specifics, feel free to ask. If your gonna race or run a higher hp motor, get a tremec.