What is the best way to setup the PCV valve when using a Weber carb and a Pierce manifold? At present, my PCV valve is attached to a hose horizontally and in-line. This means that there is no gravitational pull on the PCV ball and that strikes me as being wrong. However, since the manifold port is threaded and no PCV valves are available for a 1725 engine with compatible threads there does not appear to be any alternative. Any thoughts? Thanks.