66 Dart GT HT Whatsitgonnabe?

Best thing is to decode the fender tag to see if it had power or manual disc brakes. Also power brake masters had different length push rods, and or diameter bores.

Summit racing sells an aluminum disc/drum master cylinder based on the late model mopar aluminum one with plastic reservoir.

If going with a VW one for availability of parts be sure to size the VW master with either the same size bore or larger for fluid transfer to be sufficient to work the calipers and wheel cylinders. Remember the caliper pistons require a large amount of fluid to move them.

I'd say if you can find a VW , volvo, saab one over there that meets the original bendix master specs or larger bore go with that. Unless yours is a disc brake master, and the bore isnt pitted or scored, then get a rebuild kit for it.

Hope this helps
Matt

Matt