How To Clean Ring Lands & Re-ring Pistons

How about stuck rings ? I pulled apart a 361 that was sitting for 40+ years and the rings are stuck in the pistons. 4 out of 8, I was able to remove the others I have soaked in Berrymans carb dip about 6 hours and it removed allot of the carbon and loosened a few rings but some are mighty stubborn. Heat ?