I seem to be leaking some oil out of the front main seal. I bought a new Race Demon carb. The new carb didn't have the vacuum ports. I drilled the intake and installed a fitting to hook up my modulator for the c4 transmission. I was planning on just running Breathers on the valve covers and no pcv. When I do this though I have the leak. I assume the motor is building up too much crankcase pressure and pushing oil out of the front seal?? Am i going to have to drill another port in the intake? I could use the knockouts on the air cleaner and run the valve cover breather to that, but I am afraid that it will not create enough vacuum to stop the leak. Also, to my thinking, I really would rather not have the contaminated air going down through the carb. Anyone else run into this before? The motor is 351w based 393 stroker.