Instead of removing my stock brake booster (which is brand new) for a much larger one like the 93 Cobra / sn95 (94/95 Cobra) can't i just hook up a vaccumm canister to the stock one I already have in place, to provide much more vaccumm for the breaks and it'll equate to the same as switching to a large volume brake booster???? Has anyone done this before and worked great??
No. Adding a vacuum bottle won't increase the amount of vacuum you have, but it'll give you more pumps of the pedal when vacuum is low (like if you have a REALLY radical cam that won't pull much vacuum at idle.)
If you want more vacuum boost to lower pedal effort, you have to go with a larger diameter.
IF you want to increase the vacuum assist. If not, stick with what you have. I did ('88 GT,) and I'm perfectly happy with the pedal effort.
I know it's recommended to switch to a cobra M/C (which I plan to) and gut the stock proportioning valve and use an adjustable one. Has anyone used the stock 89 (non-sn95) M/C and just gut the proportioning valve and used an adjustable valve from Wilwood on a 4 lug disc setup? Did this work correctly and efficiently???
No. You need to match the MC bore with the front caliper's piston area. Ford used a 15/16" and 1" bore master cylinder in conjunction with the 94-98 PBRT Cobra Calipers (I don't know what was used for the later PBR Cobra calipers.)
If you use too small of a master cylinder bore, you'll end up with a long, soft pedal and the brakes will lock up much easier. If you go with too large a bore, you'll end up with a short, hard pedal, and the brakes will be very hard to lock up.
Any suggestions as far as removing the lines to the stock proportioning valve for a 3-2 Conversion setup? I've tried line wrenches and it's not working?
Vice grips and replacement lines.