The enemy of good is better
Finished fitting the head to the XK engine, a lot of fiddling with the timing chains, everything was turning correctly including both cams, but intake cam was just a few degrees off, reset the cams, tightened everything up.
And now the top chain does not turn, I can turn the crank and the bottom chain moves, but no movement transferred to the top chain.
I assume I sheared something on the intermediate timing gear. Any suggestions on what I screwed up?