I wouldn't worry about swapping gaskets. If you want compression, put a set of stock eagle heads on it. It will accept your stock intake and headers with no issue. That would be a 13:1 E85 sipping monster. Look up Buckeyeguy on lxforums for a guy running our stage 2 eagles on a stock 6.1 shortblock and running 11.70's with a tiny c am.

You could de-shim the stock MLS head gaskets if you really wanted compression, but truthfully with such small cam profiles on an already high CR motor....there is no need.

Plus, hemi's get into weird valve train noise when you change geometry. I wouldn't mess with any of it.

Port the heads, throw a cam in and be done.