Coolant nipple on back of block-type 44-removable?

[Mikea2769 at aol.com]

Refering to the 3/4 inc (approx) coolant outlet/inlet (?) on the rear top of 
the 5 cyl block-hose leads to heater valve then core. According to parts 
diagrams this is removable. Anyone removed this? Does it come out easily?

I just replace old hoses and could only force the new hose on part of the 
way. The old nipple has a lot of corrosion on it that I couldn't remove so the 
rubber does not slide over it easily. Holding OK and not leaking, but if that 
nipple is easily replaced, I'll do it. Just  don't want to take a chance on 
damaging the old nipple if I can't get it out-it's been there for 17 years and 
300k miles!

By the way-is that 3/4" or a larger metric size?

Mike Aiello
87 5kcstq, 302k miles, orig. owner