I think FRPP (Ford Racing) sells the gears. Does the '73 dizzy have points? If so, I'd recommend a Duraspark ignition. You'll want a dizzy for an '85 5.0 HO. It's the only Duraspark unit with the hardened gear. Parts stores have 'em, but you have to double check to make sure that they do actually have the hardened gear on them, as it's a one-year-only piece, and most parts stores tend to make mistakes...
__________________ 1992 Deep Emerald Green Mustang GT Hatch, 5 speed, 2.73s, Mac fenderwell cold air intake, '93 Cobra MAF, Mac 70mm throttle body & spacer, Explorer intakes, Mac unequal headers & offroad pipe, Magnaflow catback, Walbro 110lph fuel pump, Jet adjustable FPR, MSD Blaster coil, Accel 8mm wires, FRPP aluminum quadrant, UPR firewall adjuster, stock cable, Granatelli upper control arms.
Waiting to go on: Granatelli lower control arms, and GT40 Iron heads! | 
1968 mustang 5.0 hardened distributor gear question 
In my 1968 mustang with a 5.0 motor I have a 1973 distributor with a 1987 cap and a 1978 rotor ( think of that johnny cash song) It runs perfect.I only firerd it up for about 1 minute.My question is can I get A hardened gear for that year dist. or should I just go to a MSD or whatever? thank you all. Dave
