The intake manifold on the original 235 has a huge vacuum outlet (going to the hydrovac?) as well as the typical feed to the distributor. The truck now has a single non-functioning 6V wiper motor. I'm not finding new low profile 6V motors anywhere that will fit behind the motor panels (my first choice) so I may have to go back to vacuum. If so, shoule I run the vacuum lines from the manifold or should I put in a a mechanical fuel/vacuum pump? Thank you.

Cloey, my 1942 Chevy 1.5-ton 4 x 4 Fire truck