Why do you hope not? And yes probably should replace them if your tearing down the motor not sure your plans. 

3 hours ago, ennisdavis said:

It that a water freeze plug? Hope not

They all have that. I put brass in mine.

Casting core plug

https://en.wikipedia.org/wiki/Core_plug

And it's called a freeze plug but it's really not very helpful.. water can easely break your engine when frozen, those plugs are not gonna help much..

On Wiki,

The slang term "freeze plug" is derived from the many years ago in situations where the water in an engine block could freeze (due to plain water being used in winter rather than anti-freeze coolant). The expansion of the water as it froze would cause the core plug to pop out of the engine, leading to the term "freeze plug".^[4]

I hear that they do pop after freezing but the block is also cracked by then.. so don't use water ever..

I used heat, a hammer, punch, slide puller. This guss wont come off. Can get the cover off either, bolt broke off, its stuck too. I am going to drill the housing and crack it apart. I  just want to make 100% sure something wont get damaged like the crank gear or shaft while I am trying to remove it.

ps the cover wont come off because there is a bolt by the engine block that comes down into it.

sawzal time. its off. question: how do you get the dist. gear back in to perfect alignment?

https://www.google.com/search?q=site%3Aclassiczcars.com+distributor+spindle+timing