66 Barracuda Disk Swap

OK I plan to go to the parts store tomorrow to get the master, and the adjustable valve.

What should I ask for? something for a 73 dart or what ever?

Example:

I wanted to go to a gear reduction starter, so I asked for a starter for an 89 dakota this got me what I need, lots of parts store computers dont really catalogue parts older than say '75 . Know what I mean Vern......