There are some parts that usually disappear within minutes of hitting a self-service junkyard. Ford Granada brakes, for example; everyone knows they'll bolt right onto a 60s Mustang. The Mustang II front suspension is another.
If you're looking to modernize your street rod's handling, the Mustang II's rack-and-pinion steering and reasonably good disc brakes provide a well-worn route; it's not a particularly tough swap (as such things go), and you get great aftermarket parts availability. Mustang IIs have donated front-end parts to just about every smallish car and light truck you can imagine. That's why it came as a shock to see a fully intact '74 Mustang at a local yard yesterday. This car is equipped with the "Cologne" 2.6 liter V6 engine, so perhaps the serious junkyard vultures know something about the V6 cars that I don't.