help with front brake drum removel

[cknfrmr]

Posting on main forum due to did not know how to move from projects. Sorry

I am having great difficulty getting the front drums off my 69 C10. What I have done so far is sprayed them with many different brands of lubricant and rust freeing junk over the last week. Have beat on them from front, sides and rear with no movement at all. Also tried heating them up many different times. Have also backed off the brake pad spanner. Even drilled out the retaining posts for the brakes shoes thinking that if there was a groove wore in them it would let the whole thing come off as whole. None of the above things have done anything. Does anyone know of something I've overlooked or missed? What have I done wrong. Any suggestions? Would like to thank you in advance for your time and knowledge. I'm loose my mind. All the videos on you tube they seem to come right off.