fabracated valve covers and header evap

So here is the question. I just built a 499 and ave about 25 passes on the motor and the pan gasket started to leak. i have the breathers hooked up to the exhaust. Just wondering if anybody has had a problum with the baffels in the valve covers being to close and not letting the evap system work. by the time the breathers are in the valve covers they must almost be touching. any help will be greatfull.