So it turned out that the engine is pretty much scrap. The block is serviceable (3 thou warpage) and crank is good, but every piston is a different shape and size, and the head has previously been machined to death. 5 thou warpage on the face, 15 thou on the cam seats. Doh.

I'm now looking for a low mileage jap import lump.

All this so I don't have to reinstall my empeg in yet another car!

Rob