Ok, i want to build a coffeetable too, but with a blown block with a hole in the side.

Was there someting visible that the wrong sparkplugs caused the damage?

Gude Mario Audi 100 CD Autom. Bj.83 Audi 200 20v Bj.89 Audi 5000 Bj.85 Audi V8 3,6 Autom. Bj.88