Not that it matters at this point, but in the future, you can knock the old plug into the block and forget about it. The plug won't hurt a thing in there. Socket on an extension is the "proper" tool for the job

 

Thanks for the info Capt. Hook. What is your recommendation for installation? I am curious on how a mechanic would do this job since there is no room for tools to be manuever.

Bizzs

 

As they say, "any port in a storm". What you did worked just fine.

 

the block heaters usually have a combination hex/ screw head bolt to tighten up
sometimes the approach is directly from under rather than from the side
they seal with a o ring
there is a lip to prevent in from going in to far a T bar that bridges the inside of the hole to stop it from coming out