I'm thinking that soaking them in a big pan of hot water with a lot of Vinegar (1/2x1/2maybe ) mixed in for several hours may loosen up the rust and corrosion so you can swivel the pins in the pistons Let us know what you do and find out that works Good luck
Mr.Cab Racing and winning with Mopars since 1964. (Old F--t, Huh)
) mixed in for several hours may loosen up the rust and corrosion so you can swivel the pins in the pistons 
