I get pretty good results on the vacuum wipers by pulling the motor apart,cleaning everything up,and wiping the blades down with vaseline. Also get a vacuum tank from a big old Cadillac or something like that from the 60's;you can even plumb two of 'em together.If you can score a 2 stage fuel pump,so much the better. Then you can drive all day in the pouring rain and never have a problem.
This combination has worked on my '49 Chevy sedan,'51 Ford F-5,'53 Chevy 3100,and '53 GMC half ton.And I didn't have to buy any new parts. What I like the most about vacuum wipers is they're variable speed,not just multi-speed.
