I'm finally going through all my extra parts that I have no use for. One of them is my spare PRV fuel distributor. Does anyone know the story with this type of fuel distributor? This isn't the only one I've ever seen before. I've used this particular one before and it works no different than the standard fuel distributor. The difference is it has these extra allen head screws next to each port going to a cylinder. Anyone know what they're for?
Pics:
Like I said it works just like the other fuel distributors that do not have the screws. Just curious to possibly get the story before I sell it.
EDIT:
For reference, here is a picture of the more common fuel distributor: