I have not tried to do what the OP wants, but I'm thinking it's similar to what I've done on my hemi. Using an Indy valley tray and Indy intake on regular MP heads. The heads don't overlap onto the valley cover like the Indy heads do, it just leaves a slight gap in the V groove where they meet. Fill the gap w/ a bead of silicone, then you can set the intake gaskets on w/ the intake.
Some people may not like the amount of silicone needed, but it does work.
Yes you can do that. The billet valley cover will leave a v notch on each side which can be filled in with RTV. This works better if the engine has pan vacuum than if it has a lot of blowby. With pan vacuum the RTV gets sucked into the V groove and seals up. If it is a street engine and it has blowby then the pan pressure will blow the RTV out over time since there is nothing to hold it there. That is the whole idea of the batwings. The batwings are thin aluminum but that is all that is needed to reinforce the RTV.
