Technical Coolant internal problem, 1962 327 sbc I need help

I say the coolant in the ports came about when the intake manifold was removed, without draining the block first. Could also explain coolant in the pan. Coolant in a cylinder from an open valve from the same deal? SBC's are notorious for coolant leaking around the end, intake manifold bolts (and the gaskets). Post what you find out, cest vou plait. I am Butch/56sedandelivery.