1990 Tempo/leaking freeze plug/removal

My 90 Tempo just started leaking from one of the rear freeze plugs, can anyone enligten me on the best way to remove it without doing any damage to the block. Thanks.

IF it's accessible, take a large punch and whack it on one side so that it twists in the block then grab it with vice grips and pull it out. Get correct sized new one, apply sealer around the edges and gently tap it in until edges are even with block. If it drops inside the block, don't worry about it, just install a new one. Consider this...if one is leaking due to corrosion from the inside, others aren't far behind!! This is the result of not changing the antifreeze every couple of years.