Kinsler-Rons - Hilborn Pills fit it 

This is the valve that you have to install the jets, "pills", in for by passing fuel.

All mechanical injection systems need a by pass ( pill holder ) ( Jet Can )

Holds our AD-565   pills 

You can install this Hilborn by pass in your high pressure line or into the pump on any injection. With Enderle, you can relocate the by pass jet to external if you block off the internal jet.

-6 AN Threads

Not perfect  but will work fine 

Quit fiddling around and get what you need to make you mechanical injection work correctly!