Just talked to my machine shop. While I might be able to resurface the head and run it, this would require removal of the prechambers, then likely shimming them up. Mechanistically, the shop would probably run a big fly cutter across the heads deck. No way to cut around the prechambers.

Also, supposedly these heads tend to develop a wavy surface after a lot of miles, so a simple gasket swap without resurfacing might not work.

Anybody confirm this?