I think the head is annodized (however it comes from mod quad). As for the domes, they're interchangeable with my other pro-design cool head domes
Crank is true and welded, if you look closely in the pics you see the welds.
The crank was installed in january and used pretty much every sunday since. The bearings are in great shape. The only thing "wrong" is that one of the bolts that holds the timing plate came loose and rattled inside the flywheel and put some marks on the snout. The channel for the keyway is in perfect condition.