LOSENING PISTONS
I HAVE A 348 THAT HAD SET SINCE 1985. TRIED BRAKE FLUID ,W.D. 40, TRANSMISSION FLUID, BUT WHAT FINALLY DID THE TRICK WAS P.B. BLASTER,SPRAYED A GENEROUS AMOUNT IN CYLINDERS LET SET OVERNIGHT , AND IT FINALLY BROKE LOOSE.....HOPE THIS HELPS...............;) DALE