bigger brakes for 74 beetle

[airpower]

i have a 74 beetle with swing axle, and i want bigger brakes for the bigger engine im gonna put in it.

quite fancy big porsche brakes and wheels, but not really sure. just after any info of what will fit on my axles (preferably porsche). i dont mind machining caliper mounts, just what rotors will fit my spindles. also would i have to change my master cylinder, or maybe with a servo?

thanks, Giles