[Stuart]

I've done this conversion also to my 1303 1979 convertible. The only difference is that my parts came from a 944 1986 Turbo.
As for question 1 I can't help you as I bought the Porsche parts already of the car.
Question 2: You need the alloy arms, torsion bars, torsion housing covvers. You can not swap the torsion housing from a the Porsche to Beetle because the housing on a beetle can not be dismanteld as with a 944. The housing from the 944 is not neccesary because these parts are the same. Just dismantel your VW rear suspension and replace with the 944 suspension. You have to cut down the torsion housing covvers from the 944 so you can bolt them to your VW. Further more you have to remove the inner rubber bushings on the 944 spring plates to accept the VW rubber bushing. You have to clearence the shocktower for about 1/2 mm so the big bolt on the spring plate will not rubb the chassis.
As for the E-brake parts. Go with the E-brake kit from MBT. This kitt replaces a part from the porsche E-brake. The good thing is that you can use the stock VW E-brake cable. Good luck and feel free to send a private e-mail if any further question. Can make some photos to if you want.