Activities: Front to back Brake Line replacement, Rear Handbrake cable replaced, Clutch Line replaced due to visible wear and tear, MC pressure retention valve, remove & replace speedometer cable.
MC Pressure retention valves were seen in both MC orifices. The one servicing the disk brakes was removed.
Clutch Line Replacement: No problem, Adequately bled it afterwards. Clutch functions well.
Rear Handbrake Cable: One heck of a job. Because of dual exhaust, and drive shaft were in place, this is one *itch of task. No room to maneuver. However it got done. May still need additional adjustment but for now it stops the car from rolling. Also, the cable is longer on one side than the other. Didn't know that.. Issues, one of the tabs securing the line to its holder in the tunnel broke, had to make one. Will need to buy replacement ones but they are narrower than the brake holding tabs and not sure where to get these new.
Remove/Replace Speedometer Cable: R&R Speedometer cable. You have to be a circus contortionist to work upside down under the dash....Got done. When tested it was a bit jumpy/ delayed, but it did work. Could be because of years of non-operation and that fault may be inside the gauge itself...The old cable was rusty and had broke in half. The plastic/rubber outer casing was damaged and missing in some spots.
Front to Back line replacement: Well, I actually did "OBVIOUSLY" forget, BUT the line was only flared on one side (back), since i cut it longer than needed because I want to place it first and then see how and where i would cut it....hah hah, before I attached it to the car. So the fitting was fed on the hood side and I tied a rope behind it, then pulled on the rope while underneath the car and the fitting made its way all the way to the back...Pretty easily, actually.
Cut back the old line to the tunnel area so it would not be left in the engine compartment and leaving the securing tabs there free for the new line.Then I isolated the line, by getting two long pieces of fuel hose 5/16 or 3/8 and cutting it long ways in a spiral cut that would wrap around the line the entire length of the under-body. Then I zip tied the hose every 6 inches around the line. Did not cut the line on the back side, just bent it out of the way.
The next thing was to now secure the line/hose along its way and out of the way of any pinch points and/or moving parts. Then the final touch was to bend and secure the line along the underside. Looked good.
Now that left me free to bend and secure the new line into the brackets in the engine compartment that had held the old line. Now came the time to put on the front fitting and bend the line accordingly to the MC. Then I knew where to cut it and flared (once again ensuring that the fitting was on the line and facing the right way. Then I flared it and could now connect it to the MC.
Bled all four wheels, and tested brakes: The brakes do stop the car BUT take 3 times the distance. The brake pedal does go all the way down and is soft, (feels almost like power ABS Brakes) not that traditional had mid way resistance. Will have to analyze and address again. I guess another way to put it is to compare it to the steering on a 240z compared to the powered steering on a new car..
Known: The MC is a 15/16 which provides additional stopping power (~20%+) versus the stock 7/8 MC, and the Booster is a 7" double diaphragm which also provides additional stopping power (~27%). Together, the added stopping power should make the car brake and curl on a dime. It does not.
Suspected: The Booster reaction disk is missing, and the booster push rod is not correctly adjusted for length. This would create a long brake push. It does not have an airy mushy push like when a brake system has when it has air in the system, HOWEVER I did not bench bleed the MC and the fluid receptacle was empty.
Path forward: Remove the MC, Remove the Booster, check for existence of reaction disk (if not there, buy/make one - 6mm thick I believe), Adjust booster push rod correctly, reinstall booster/MC, bleed MC. May also re-bleed the 4-wheels.
Assistance: Any and all would be appreciated in the form of diagnosis, suggestions, and information on perhaps where to get a reaction disc and what the soft brake causes could be.