cleaning up the slant six head

Any suggestions on what I can soak my 1984 cylinder head in?

I am going to re-condition that one I am thinking and leave my already re-built 86 head as a spare.

I have read soak it in vinegar, Coca-Cola, and personally know Lysol toilet bowl cleaner to work very well on de-rusting parts but have never attempted using it on a cylinder head.

Lots of carbon build-up on the head.

Id prefer to maybe stay away from the Lysol, I know its pretty caustic and I am concerned with large amount of flash rusting once the head were removed from the solution in areas that I may not be able to treat without an additional dipping step.

I know I could just pay to have them cleaned but Id like to do as much work myself as possible to save cash and by the time I drop them off, pay to have them cleaned and go pick them up I may have spent quite a bit more than a few bottles of Coke and the Coke might do just as well of a job.

What do you guys use?

I can be posting pictures as I go along if there is any intererst?