Booster and vacuum Will Not
cause Low Pedal and related problems. Only thing they cause is Hard to Very Hard Pedal when have vacuum problems or booster is dying/dead. Push pedal a few times w/ engine off and that is best example of "dead" booster.
Only time a booster can cause low pedal or brake hydro problems is when some moron replace it and never bother to adjust the output push rod that hits the MC. If has OE booster then won't happen. (Many replacement are correct out of box but not all and need tools to adjust. low pedal means output rod is short. hydro then rod is too long and MC can't return to rest.)
Manually adjust P-brake might help short term but if does rears are "dead" and need replacement and sooner then later.
See my Cave, Rear Brakes
and rest of brake section.
SS Hoses are Hype BS product even if labeled as "DOT Approved." As soon as you add support for middle of them the DOT cert and often Warranty is Void but most buyers won't bother w/ either issue until have problems.
see rubber brake lines vs stainless steel http://www.fiero.nl/forum/Forum2/HTML/129208.html
Get New OE Type hoses meets SAE J1401 often sold as "pro grade" hoses. This Hose "Rubber" is labeled as DOT106 and SAE J1401.
------------------Dr. Ian Malcolm: Yeah, but your scientists were so preoccupied with whether or not they could, they didn't stop to think if they should.
(Jurassic Park)The Ogre's Fiero Cave
[This message has been edited by theogre (edited 01-13-2021).]