Next steps on Monday are to do the flexible brake hoses and replace the rear brake shoes. The front hoses look rough and the rears are of unknown age so I'm just doing the lot to be done with it.

I am troubleshooting the vac system before pulling the transmission.

Question: I have found the vac line that travels across the back of the engine, goes into a banjo bolt in the back of the right manifold and then transforms into a metal line that goes down to the transmission. Does anyone know the correct vac on this line as it would be easy to insert the Mityvac into the union just "upstream" of the manifold banjo bolt and measure it?. I have been unable to find the answer to this on my 107CD or on the ATMSG manual for the 722.312

I think vac or a bad modulator valve are at least part of my issues. I disconnected said vac line and the 2/3 flare got a little better. No change on the 3/4 flare.