Tee-ed in a new Sunpro boost gauge (vac/pressure) into the vacuum line and got a steady 22" hg idling/cruising. Is that within spec for the vac pump?

__________________
85 300D turbo pristine w 157k when purchased 167,870 July 2025
83 300 D turbo 297K runs great. SOLD!
83 240D 4 spd manual- parted out then junked