I'd have to question why Zul's and Ferrara's name would be on the same car. I don't believe they were in partnership, and neither one was an engine builder. They both were just owners/drivers. It doesn't make sense to me.
I was at E-town almost every weekend back then, and I never saw that car.....
I never saw a Zul car until the '70 ProStock showed up in '71. (which I believe was Jink's old car)
Of course, I'm an old guy and I could be wrong.......