[Oldsmaniac]

I would suggest you try a paper type gasket such as MR Gasket etc. These are usually thicker and the front and rear rubber seals usually end up too low so silicone is needed on these front and rear. I have found these to work well but must be checked now and then after initial torque-ing of bolts as the paper tends to squish over time. I dont worry about not having the valley tray in place with these but they are available if you think you need one.