[bill1234]

If Marciano and Shavers fought in their primes, Marciano would KO Shavers after a lop sided slug fest to Marciano's favor. I am guessing MArciano would dispose of SHavers in about 5 rounds at the very most. What do you think?

 

[bill1234]

He also didn't rely on 1 punch KO's either. Marciano would have been close to Shaver's power. Shaver's also had chin issues, as where Marciano obviously doesn't. Marciano also had more stamina too.

 

[bill1234]

Your basicaly born with it. Holmes was an exception, his first trainer was a journeyman pro and would throw jabs at Holmes face until Holmes would not flinch or blink. But htat was only part of it, the rest was natural for him.

 

[bill1234]

I wonder if I've got a tough chin... how should I find out (the safe way)?

I don't know of a "safe" way, the only way I know you could find out is in the ring with harder hitters.