For what it is worth
Over the years, I've done countless intake swaps on SBF's with no probs
and here is how I've gone about it
I use the cork China wall gaskets
I use yellow 3M Weather Stripping Adhesive to glue them to the top of the wall
I put a dot of RTV in each corner of the China walls
I use no gasket sealer on the side gaskets
I use 4 sections of all thread to guide the intake down nice and straight
I follow the standard torque pattern to tighten all bolts
I go to about 50% of the maximum tightness repeated times until all bolts
obtain even tightness which can be 3 or more times
I then go to my final tightness until all bolts are equally tight
After two heat cycles, I go over all bolts again to check for even tightness and
I might add ... I've always found several to be loose
Agree or Disagree with my methods
I don't have leaks, or end gaskets blow out, or anything like that
Grady