I modded a 5hp briggs with .300 cam, billet lifters, heavier springs, new valves, eyebrows shaved, mikuni carb, billet rod, 3hp flywheel and coil, timing advance, honed and new rings. I have way too much crankcase pressure and I'm running 2 breather tubes right now, 1 to a fuel pump and 1 is just onpen tube but is getting catch can. The pressure is pushing oil to the top end and causing it to smoke. I didn't measure ring gap but all was good before modding, no smoking. I pulled the oil cap while it was running and there was a lot of pressure. Any ideas on how to fix this or what caused it, I know blowby will do it.