so your point being is that you think you've stumbled onto something that nobody in the history of building these motors has considered? and now you think that somehow equates to you having a "one up" on others?
fine. fair enough.
however... the point remains that you've never done it. so you don't know. all you have is a hypothetical. which... well, isn't all that hypothetical because nobody has encountered this problem. the most likely scenario is because if you're decking the block that much, cutting the heads to that degree and running that thin of a headgasket you're build a gat dang race motor and *gasp* you're using studs. imagine that.
i just put the heads on my 318, and if i didn't just pay $50 for a head gasket and intake gaskets and it wasn't a pain in all nine assholes to pull one off in the car, i'd do it just to get the measurement and show you how much room there is left down there.
i love how you get wrapped up in a bunch of hypothetical inconsequential nonsense on a motor that you're never gonna build for a car that you don't even own.
don't sweat the petty stuff and don't pet the sweaty stuff, danimal.