Cylinders 1 & 6 rusted tight. Penetrating oil for a month no help.
Used Eastwood Rust dissolver for a day, drained & replaced 2 times. Then some gentle heat (torch) and let the chemical burn, twice.
https://www.flickr.com/photos/mikeybs51chevy/50766493906/in/dateposted-public/Then 2x4 then started moving back and forth by tapping with block and hammer on different pistons.
In about 20 min had crankshaft spinning.
In machine shop now, certain boring due to corrosion.
