I put a double action fuel pump in on the 41 and the vacuum side sole purpose is to run the wipers, no problems when climbing a hill as the wipers don't work off the intake vacuum anymore.
"If it ain't Steel it ain't Real" "Earth the insane aslyum for the rest of the Universe" 41 1/2-ton, a work in progress 68 Shortbed stepside 327/325hp/700R4
