Good info and thanks to all of you for responding. I ordered this fuel pump from LMC and I had a choice of vacuum or no vacuum. Since my truck originally had the vacuum wipers I wanted to put it back together as original as possible. Wanted to be sure that what I was installing was the right type. It will be a couple of weeks before I am back home with my project and can compare the pump I received with my parts order with the information and photos you folks provided.
Thanks again to all the good assistance an Happy Thanksgiving to all of you!
John
