Carbon locked

Just to recap an 85 with a 12a motor, the car sat for four years inside. And I've tried the ATF with nothing! I finally got my hands on Amsoil Powerfoam and I loaded the engine up through all four plug holes. How long should I leave it? And just how much force should I be using? I am only using a ratchet and hand power on the crank! Is this enough power to break it free? Is there any other things or tricks I can try before I have to yank the motor?
Thanks

Anyone!!!!!!!!!

Try a push start.

I got my car pushed up the hill and started it beautifully. Good luck.

you could use MMO, but if you cant even turn the shaft, i doubt it will make more good than ATF