How many of us are there? Owners of Dodge based RV's?

VintageMopar wrote:
Yes, it’s for the cruise vacuum diaphragm, so it doesn’t lose too much speed on long hills.

Makes sense, and I kind of suspected it was for that. So does that mean that I need to reinstall the vacuum amplifier and just cap off the ports that went to the EGR, because there is a small nipple on the amplifier that corresponds to the reservoir, or can I just get away with using an adapter to enlargen the line from the small nipple on the reservoir to the cruise servo nipple?