A)I would scuff up the block and intake front and back where you would put rtv...2nd use the coll blue stuff for water pumps ect....after that I would use 1-4 thick like stated.

B)If you dont want to use rtv I would go to discount auto and they have the rubber gaskets for the front and back holds better then the cork..and I would put a little rtv on them ect. scuff both surfaces once again.

Hope this helps...