Draining coolant in 1995 Si

I have a couple questions. I have to remove the head off my H23a and the Helm's manual says to drain the coolant from the block before removing it. First off, if I skip this step, is there any chance that coolant will spill into the cylinders when I remove the head? (I've already drained the radiator and head coolant) And secondly, if I need to drain the block, how do I get that bolt off? The reason I'm trying to avoid this step is only because I've been going at that bolt for a while and it won't budge. I'm sure I cold break the torque with an air tool, but the space a way too cramped, and when I try a socket with a breaker bar, the socket get kinda crocked, and it hasn't worked. Any advice on this problem is greatly appreciated, this is the last step before removing the easy to access bolts, and then the head is off! Thanks in advance.

yes it will get into the cylinders, get some spray from the parts store to help break it loose, use a short socket and a breaker bar and cheater pipe to break it loose

gunnmen01