I was looking at the photos of your turbo truck - the right stuff, I'd say.
This diagram shows the donor parts you want from the late seventies distributor. The armature is also called a "reluctor" in other literature. It can be pried off the top of the upper rotor shaft with a pair of large screwdrivers. Usually all rusty on the older donors - a new one is $5 at NAPA.
The later vacuum can (with a dogleg operator arm) has to be used - it will also have an adjustment screw to turn the vacuum advance up and down - I don't know how you can use it with boost - but it will stabilize the advance plate.
You might want to build a replacement for it - that simply holds everything still so you only run on mechanical advance.
This ought to get you started -ask some good questions and we'll figure it out.
Steve Metzger Tucson, Arizona