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Old 10-21-2020, 10:06 PM
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Al Schober Al Schober is offline
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Yes, remove all those plugs. This will give you or the shop access to the passages. Use similar weapons for cleaning as are used for a rifle barrel - wire brush on a long thin rod.
Original plugs have a cross slot. I changed to plugs with a recessed hex (they take an allen wrench).
Oh yeah, be sure the camshaft bearings are removed before they hot tank the block.
When you get the block back, I recommend you change some of the original fasteners from bolts to studs with nuts. I've done this at the water jacket cover plate, the tappet cover plate, and the carb attachment to the manifold.

Last edited by Al Schober; 10-21-2020 at 10:11 PM.
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