After narrowing beam 3" what else is needed?

[Bugs]

Hey, Ive got a 74 Standard which Im finish restoring, and want to give a little german flare.

Ive spoke to VDubengineering about narrowing my beam and some brake options, and I know what I want in the end, but I am still a little confused on some stuff.

1st - If I have my beam narrowed 3 (1.5 each side) Do i need to do anything else to the body to allow the narrowed beam to fit? some have mentioned notching body work in the wheel well, which I dont want to get into. Is this needed? Or can i simply throw the freshly narrowed beam back in with no other adjustments needed?

2nd - im planning on doing my brakes in 2 stages. Stage one, have the front and rear factory drums studded for 5x100 so I can run new style VW wheels, and later on, conver the fronts to MKIV brakes. What Im worried about is clearance etc with my stock fenders. Car will be lowered with drop spindles as well as a tad more from the adjustable beam.

From what Lanner @ VDE was saying narrowing the front beam will allow me to run 205/40/17s with a ET38 wheel. Will my rears be ok with just the restudding, trimming bump stop and replacing the bolt on the spring plate with a flat top? or is some sort of narrowing required out back to make it all fit?