If it's like most basses 30" is not an exact measurement. This also has a curved top and a trapeze tailpiece. So the recommendation t
to do a careful mock build to make sure how everything will fit is a good one.

If it were me I would put the neck as tight up against the pickup as possible for balance and for aesthetics.

To see where the bridge goes measure the distance from the fingerboard side of the nut to the center of the 12th fret. The pickup side of the G string saddle should be exactly the same distance from the center of the 12th fret.

With the bridge in place, make sure there is enough room for the trapeze and that the bridge is not at a weird angle because of the curve. It should be fine even with the neck touching the pickup ring, but it's a good idea to check anyway.

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