No deflection detected on the cailper brackets. The hoses have held up great so-far. I have driven the car every day this summer. I would feel better if they were a few inchs longer. I was concerned they would get squashed by the front coil springs, but the springs don't compress enough (even during my very spirited driving). The hoses look strained when the car is on the jack stands also. The only thing I notice is the brake pedal is about a 1/2" lower. The brakes don't feel any different at normal cruising speed. Pulling it down from over 100mph is way better feeling then the stock system. I used to think the car went faster when you hit the brakes at over 100!!
Darryl (posts here sometimes) did a similar swap and he used stock type lines.
http://www.a351must2.atfreeweb.com/
(Go to "updates" (the link won't take you right to it).
I am going to get some longer lines. The Allstar line kit came with all the fittings, so two slightly longer generic Earls -3 brake lines will fix it up.
Hope this helps.
