MPS, Rebuilding the MPS Options

[Ron914]

Hello to all who have helped me with this project . @emerygt350 ,@TJB/914, @Superhawk996 , @ChrisFoley , @rjames , @MDTerp
I am in the middle of rebuilding my MPS and have a couple of comments and questions .
First when I opened up the unit I found the most difficult job was removing the rivets holding the two halves together.
When I removed the retainer plate to take out the old diaphragm it was in two pieces .

I needed to take two measurements since I was replacing the stop screw , I needed to measure the the stop screw protrusion into the housing . The instruction sheet sent to me by a member had the measurements he must have made when rebuilding his MPS . His stop screw protrusion was 1.97mm and mine only measured 1.72mm.
His inner/outer screw assembly depth in the old diaphragm measured 6.51mm .
Here's one of my questions ?
when I measured mine I got two measurements depth to inner/outer screw assembly was 4.03
and depth to the washer outside the inner/outer screw assembly was 5.46mm.
Again there is a difference and since mine was never accessed before (epoxy over screw was not disturbed) is the difference in measurements ok and which measurement should I use I will try to attach a photo or two to help with my question.
this one .

I have not touched either of these measurements yet and awaiting any help/comments.
I think it's this one to the washer on diaphragm .

[Ron914]

Well I was optimistic that my car was going to run a lot better this morning after installing the rebuilt MPS but that was not the case .I reconnected the retard to the distributor and removed that resistor I bought from AA in the CHT circuit and started the car and it would barely start , changing the timing did not make difference in the rough idling .Quite different from before I changed the diaphragm in the MPS . The car was rocking back and forth and running very rough . I first checked my plug wires and found them all intact . I then removed the distributor cap and inspected it and could see that the 4 contact points and the end of the rotor were burnt .Did not know what to think of this but figured this must be the rough running issue . I had installed a Pertronix system and removed the point/condenser several months ago so I decided to remove the pertaronix and reinstall my points /condenser. I also cleaned up the burn marks on the cap and rotor ( I installed brand new cap/rotor and plug wires after the rebuild of my motor) . I have not tried installing a new set of plugs since it was running ok yesterday .


This did not make much change and after several hours of scratching my head on this one . I needed to take a break . Its going to be a busy weekend with Mothers day and another comitment so I may not get back. to this until next week .