[krushmoto]

Well when you disconnect the hoses most of the coolant in the block will discharge. Just make sure you have something to catch it.
When you pull the manifold off whatever coolant is in the manifold will spill out into the block. MAKE sure before you reassemble the manifold take out the oil drain plug(keep it off until every drop of gunk drips out) & pour fresh oil all over the block and then after finishing the job replace the filter. Also make sure you do another oil change about 1K miles after.
That's what I did and my engine runs fine. I put on 150 mi/day and I average 75-80 mph. So in my opinion my engines fine. Let me know how you do with yours.