Hydroboost feasable on our cars?

I would be inclined to think that hydroboost would work better with Cobra calipers (probably since the '96-up cars don't require a different M/C). Weight difference I'm not really concerned with, since I also plan on adding weight with a new 418 in the next year or two, so the hydroboost unit would probably allow me to run almost any tall valve cover without any annoying clearance issues.

SorsCode - How much was the '03 setup you picked up, if you don't mind me asking?

Sweet! Thats somewhat cheaper than a new vaccum booster, I might just have to source out a junkyard one and get it just for the hell of it, and see if I can make it work. Worst case I'd have to make a bracket to install a 4.6 P/S pump. If thats actually necessary, that is. I wouldn't mind getting rid of that nasty looking stock pump and reservoir anyway. At least the 4.6 pumps have a remote reservoir, which I could mount out of sight.

Okay, after looking at some 4.6L pumps, its obvious that it would be alot of work to install one on a 5.0L. Seems to me as there are only 3 lines to the system, one pressure line from the pump to the booster, one pressure line from booster to the steering rack, and one return line from the rack to the pump. If I'm not totally off my rocker on this, wouldn't it just be as simple as hooking up the pressure side of the stock pump to the inlet pressure line of the hydroboost, then running the supplied line from the booster to the stock location on the rack? Do both pumps provide about the same hydraulic pressure? The more I look into it, the more this seems like a bolt-in swap...

Alas, no. My imagination was running wild back when I first posted that, these days I have not had the time or money to do much work to the 'stang on top of all of the stuff I have already done to it this year. I'm still interested in doing the swap some time next year though when I have the entire car torn apart. I have read that the stock booster is next to impossible to remove from the stock location, but yours being a '68 you probably don't have that problem. As for rigging one up to work on a classic mustang, I don't know much about that. You might need to fabricate an adapter plate for the firewall and make a custom-length rod for the pedal. Do any of the big brake companies (Baer, Brembo, etc) make adapter kits for newer-style boosters? Then getting lines made would be the least of your worries, lots of hydraulic shops can custom-make lines that will work with that setup.

Wow, thanks for the link!
That pretty much answers all of my questions about this swap.