More fun and joy

Still doing battle with the butchered enfield. I managed to track down a new front brake hub from a continental GT (It's got an air scoop! Cor!), and the wiring is pretty much done.

Since everything I've looked at has been a carnival of horrors, I decided I'd best check the only bit I've not touched, the engine top and bottom end. Good job I did too! Here is how the cylinder looked with the head just removed...

You're really not meant to use any silicon there, and certainly not that much. It seems to be a mix of parts too, the manual said there should be 2 extra head bolts either side of the pushrod tunnel. The holes are there in the head, but not the barrel.
I then spotted the state of the piston, and just this once I can't blame the anonymous cretin. Note where the valves have clobbered the crown, due to the clearances being the wrong way round. Note too how the marking for the front of this piston is in the middle. Genius!

Having said that, I'd have fitted it with the writing readable from the seat, if that makes sense. He hadn't, so still minus points there.
The conrod doesn't look great either, bit of damage here:

So, two questions: is the piston likely to be OK if I dress out the damage, or is it definately scrap? And same with the rod, does that look like enough to condemn it? I'll check the valves to see if they are bent. Problem is, I'm not sure if the cause of the damage was spotted and sorted by the previous rebuilder, or if it has been running like that.

And finally, Crich Tramway are having a classic bike and scooter weekend on the 18/19th May: http://www.tramway.co.uk/events/classic-motorbikes-scooters
I'm hoping to get all my bikes up there, and possibly this here enfield too.