I'm on my "third" Edelbrock valley pan since 2013. For whatever reason, heat cycles? crankcase pressure?, I've had two that cracked at the 90 degree bend and started leaking. Also, the edge above where it bolts to the head becomes distorted. I just bolted on the last new one I had, because I was in a hurry. Will order one of Andy's plates next. I got more time out of the last one by running a bead of RTV down the inside of the bend. I have kind of a love/hate relationship with these heads. The couple of contingency checks Edelbrock sent me help with the love portion