It sounds like the Ford Power Parts intake.
It was make by Edelbrock.
They cast up their F4B intake but put Ford numbers on it.
Good intake. Alot like the Performer RPM... better top power than a Performer.
Personally, I don't see the intake as more valueable than an F4B, but it's a fact that folks will pay more for it because of the Ford numbers.
If it is not an SBF intake, but rather a W intake, then it is a Buddy Bar cast intake for Ford Power Parts. FPP was back then what FMS is now... Ford marked parts that are made by aftermarket companies. Edelbrock makes most of the intakes, then and now.
Dave