Finished filling the radiator, primed the oil pump, stabbed the distributor. It lives!
Ran it for 20 minutes at 2-3k rpms to break in the cam, then shut it off. The tune isnt quite right, but i think theres an issue with my wideband, because theres no way its this lean:
Its like 19:1!: I couldnt find any leaks on the headers or collectors, so it could be the O2 itself. I have another so ill swap it out for the other one and see if it makes a difference.