Convert Manual to Automatic VB

It's been awhile since I've looked this over, but I'm sure there are modifications to the VB or at least the plate whatever it's called---drilled orifices. I'm going to say "no."

Personally, I've always thought a better question is, "where are the headwaters" for MVB conversion? "Back in the day" we didn't have Cope, Trans-go, all the rest. SOMEBODY sat down and modified them. SOMEWHERE in dusty old books and drawings there surely is the beginnings of this