RICHARD: The original production spec from head gasket surface to valve
gasket
surface is 3.330".I dont think the head you have has ever been milled as
3.328" is within the +or- range..090 might be too much depending on the fuel
you have available.In addition the shelf ove a portion of the intake valve
could be too thin & you dont want it to break off in a running engine.I think
a good auto machine shop should advise you on valve seats as we cant see
them.If I can be of any further help just ask
KEN G
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