CamaroMan, Indigo makes a PCV kit for just what you are talking about. Frankly I would not run an A-4 without one!!! These engines were designed before the PCV valve was invented. The designers did engineer a slash tube to try for the same thing, the valve just works better and is far more efficient at reducing blowby fumes from the engine.
Do you use your blower full time or just to start. Gasoline engines should have a full time blower no exceptions for safety! IMHO
The other cause/remedy is to much lead in the timing. IE your timing needs to be set and probably is to advanced. Try backing the timing up a bit ab=nd be sure the c-advance is functioning.
Dave Neptune
