Gary,
We don't use the March crank pulley because our dampers come with a pulley.
Our billet remote
oil filter adapters are tapped for 1/2" NPT fittings in/out. Our cast remote
oil filter mount (the one the filter screws to) also has 1/2" NPT threads so this keeps the hose plumbing simple - no step-adapters, etc.
Thanks again,
Chris