Have now tried starting it at least, still some sounds but I think the worst of the clattering sound is gone, need to listen better once I get it out of the garage.
We have a new apartment that steal all of our free time right now.
And I ran into this:
Started getting puffs of smoke when the drops landed on the exhaust.
So need to take it off and see what is wrong.
EDIT: Turned out to be me forgetting to tighten the bolts holding the valve cover so this was an easy fix.