They are a fantastic engine as they're also very light being all alloy, however it has to be said they are indeed very expensive to rebuild. Being so rare most of the parts cost and arm and a leg, a set of four cams will be around £2500 and just the main and big end bearings will set you back £500 odd. Thank Christ mine didn't need cams eh?
2500 Quid...bloody hell mate, the whole car including the restauration and possible V8 won´t cost that much...!
It's because they have to be custom made, there wasn't many of the cars they were installed in made so the demand is fairly low.
..probably sounded good though!