318 edelbrock intake install ( round two)

Hey guys. I installed a 4 barrel intake on my 318. I used the intake gaskets that lay against the head that edlebrock recommended. They are pretty thick. I didn’t use the cork gaskets that lay at the front and back, just used rtv. Car runs great and is fun to drive but I’m leaking oil pretty badly out the back of the intake. So I have to do it again. Would it be ok to use the metal intake gaskets (stock) or would that cause an issue for some reason. I’m going back and forth on using the cork gaskets for the front and rear seal and loading them up with rtv because I really don’t want to do this a third time. Any feedback would be appreciated.