I use a broken piece of coping saw blade to go up between the block and the seal to disturb its grip. Then I use the Sneaky Pete corkscrew. You may get the old one out but you won't get the new one in without dropping the crank.

1951 GMC 1 Ton Flatbed -- It is finally on the road and what a great time I have driving it!
1951 1 Ton Completed

My Chevy Master 4 Door is on the Road!