Here is the way I removed the balance shafts and plug the Oil Hole on this 2.5 N/A block. It will also work on a turbo block. Or go to Cliff Ramsdels site for a "How To" on the way he Plugs the Oil Hole. http://www.hometown.aol.com/mopartek/balanceplug.html
Balance Shaft Assembly
End View of Crank/Balance Shaft Drive
Remove Cover Plate to access Drive Chain.
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Grind Tips off of one link, then pop apart with screwdriver to remove chain.
Remove (6) Bolts (Use ONLY 6 point socket, These Bolt Heads round VERY easy)
Oilhole (circled hole): Drill & Tap 5/16"-18unc and Plug hole with Loctite & Screw.
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If you don't plug this hole, you won't have any oil pressure!