Dave1947: WElcome to the bolt.

This topic has been discussed many times. It will depend a lot on just how bad yours is stuck and you will probably not know that right away.
Fist understand that soaking it "overnite" may not do the trick. There are some that takes a while to penetrate which again dependd on just how bad it is.
Many ways have been tried and to some degree they all have worked one time or another.
Disel fuel, Marvel Mystery Oil, WD-40, Kroil and automatic tranny fluid just to mention a few. Soak it, try to turn it, soak it and repeat. Using the pry bar on the on flywheel teeth is a good idea. Be patient. Give the stuff time to work and save yourself from tearing up stuff.


1937 Chevy Pickup
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1952 Chevy Panel
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1950 Chevy Coupe
Pictures!

I'd rather walk and carry a Chevy hub cap than ride in a Ferd.
I can explain it to you, but I can't understand it for you smile