Originally Posted by Mr. P-Body
A little less "effort" to accomplish the same thing Lynn (LATECH) is talking about... remove the 1/4 NPT plugs on both sides of the block near the pan "rails". This will drain the coolant from the block entirely. They generally have a 9/16" "head".
Slight thread hi-jack...
How do you remove these? Mine are stuck and when I tried to remove them the head started rounding off. When I had the machine shop rebuild the shortblock I asked them to replace them, but they 'forgot'. My father in law says the old trick is to replace the bolts with a marine style drain petcock so you never had to unscrew them again (not sure what do to on the road if they start leaking though).