Ken,
    Your clearances on the side of the PCB which has the connector should
allow for the seating head.  Some heads have a footprint on the board which
is greater than the component outline.  Your clearances on the side opposite
the connector should allow for proper support of the board under the
connector.  The support area under the board should be at least as large as
the footprint of the seating head.  If the leads of the connector protrude
through the board there will have to be a hole pattern in the bottom support
to accommodate the leads.  It helps to have some thickness of material
around the perimeter of this hole pattern.  The amount of material that
should be left will depend upon what the load pallet is made from.  Aluminum
will perform well with less of a perimeter while FR-4, Delmat, Durastone or
some other composite will require a larger perimeter.  (Aluminum pallets
also have several drawbacks associated with them including cost, handling
and storage considerations because of weight, etc.)  You will also want to
be certain that there is enough clearance around your tooling holes in the
board.  How much clearance you need will again depend on your pallet
material because the consideration here is how much material you need to
retain a tooling pin.

Hope this helps...

Valquirio N. Carvalho