Intake Gasket advice

Hi Rat , as you have found out that rubber on the factory gaskets is not very fuel resistant , not a problem with injectors aimed directly at the the cylinder head , but on a carbed manifold with , perhaps an overfueling issue !! not so good . which is why silicone sealants should never be used to seal intakes .

My theory fwiw on the oil burning issue , based on your last post and following your progress.

could be related to fuel dropout , if it's bad enough it can result in bore wash , the excess fuel can wash of the lubricating film that is collected in the honed finish of the bores , some of it gets burned and with revision some ends up back in the intake side .
The bores and rings get polished and the whole situation just gets worse .

I don't want to sound so doom and gloom but I thought it worth mentioning .