I'd mount the prop valve as low as possible, then plumb a new short line to the rear T fitting. Then run a new slightly shorter (than stock) line to the front. If you're running a VW pedal assembly and mastercylinder, I'd try to stick with all VW stuff/metric fittings as much as possible. The more connections/adapters, the more chances of a leak!
I've seen generic bubble flare lines of many various lengths (but can't remember where at the moment?), so you could just make up your own system.
I'd also plan on one of these - pressure bleeder:
http://www.motiveproducts.com/02bleeders.html
Too much fight'n and cuss'n to bleed a new (dry) system and get all the air out! BTDT!
Jeff