what does cylinder decks not being true have to do with aynthing in this thread? he doesnt mention that cyl decks are outta wack.
if your under the assumption that yama-bond/3-bond liquid gasket maker can not be used to seal a head to the cylinder then you are mistaken. ive used stock heads cut/rechambed for 68mm, with higher then 140psi, yamabonded straight to the cylinder and there has never been a problem.
just as any aluminum base gasket spacer will need a top and bottum paper gasket to seal, the head spacer plate would require the same thing sumtihng to seal the head to the plate and the plate to the cyl and since we know there are no paper head gaskets.....what does that leave you with?..... yama-band/3-bond.
lightly apply the yama-band to both sides of the plate(or head and cylinder), slide the plate over the studs, slide the head down on top of that and torque your head nuts.
explain the how that is cobbled?