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Had a head job huh?
Mr Guitar,
The 4a engine series is a non-interferance engine.
That means when the timing belts blows no valves go thru the pistons.
I don't believe shaving the head or decking the block will compromise this unless it was extreme.
I suspect the shims you are referring to are only necessary if one dis-assembles the cylinder head as the overhead cams setups are self-contained within the cyl head and any tiny decrease in deck to cylinder relationships might be absorbed with the timing belt tensioner?
Since you indicated you got your 12 point tool last week, your parts may be scattered on the floor as we speak? Was something broken?
In 20 years of owning Mark 1 engines I would advise the use of OEM head gaskets for longevity. If your into high pressure turbos and tissue thin head gaskets keep that 12 point nearby it's going to get plenty of use.
And if you want to measure something, going to a huge cam lift with a shaved head/deck may provide you with the opportunity.
Here's hoping all goes well in your automotive adventures!
Tim
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