...see here, if for no other reason than to see some really impressive skills at work... but a lot of good information on sorting thru the booster piece and also getting the right flares in the brake tubing.
https://pantera.infopop.cc/top...lle-in-norway?page=2
Early Pantera used a master cylinder that looks a whole lot like the Goose, just a different bore...and used the same VW style reservoirs and feeds.