that would work.. to sustain breaking for a few more times.

the thing about take off the vacuum line, is it is not actually manual brakes, just like power steering without fluid/pump isnt manual steering. To make it manual (and easer to push than just removing the vacuum line) you need to put a hole to open air on bother sides of the assist diaphragm. then you would not be fighting the residual either.

manual brakes arent "that" hard to push, i say if you know what it will cost you, do it. if you ever want to return it to stock, you will need a brake booster.