Posted by Vaughn on Saturday, July 26, 2003 at 11:23AM :
In Reply to: 61 WM300 VACUME BUILD UP IN CRANKCASE posted by Bob Stopka on Saturday, July 26, 2003 at 9:06AM :
You are missing the metering valve that goes into the pipe from the rear passenger side tube to the intake manifold. I will send you a picture of a 251 that shoulws how it is setup.