Freeze plug removal issue

hey guys on my 64 300k with 413 front driverside freeze plug started to leak so I got a new plug. I attempted to remove the leaky one and it just crumbled and my screw driver went right through it!(I couldn't get a socket or pipe to punch it out due to the motor mount in the way).

Any suggestions on cleaning this crap up for the expansion plug install( expansion plug is a temp fix until I pull the motor, I've had success with them in the past when installed properly)
As always thanks for a...

Freeze plug removal issue