Hood Scoop Seals

I'm planning on using a Hemi style hood scoop with a 2x4 intake set up.

How do you plan on makin an intake with 2x4s??? :-k won't the gas eat away at the would after awhile?? How much rtv will you need to get it to seal?? How are you putting it together? With glue, screws or 16 penny nails??? :banghead: ok I'll shut up now.... :D