I'm gonna have a well qualified engine builder have a look at it and see what he thinks about it.
Seems to me that effectively lowering the cam in the head would cause problems when trying to adjust the valves... the shims likely would be thinner than the range we currently have to work with. Maybe "tipping" the valves could accomodate that, but there's also the issue of the cam cover bolting to the now-shorter cam caps... Would that create a problem leading to a leaky cam cover? Just a couple of thoughts i've had. I'm sure there is a way to rectify this problem but it's gonna require careful thinking.
