I've kinda read this thread and it sounds like you want to remove pin #70, so that you can remove the cylinder to have it repaired....
I make two assumptions... 1) the pin was installed from the top down and 2) pin is now 'rust welded' in the mounting hole of the cylinder.
I'd , put a kittylitter box/ pan under the 'area of interest'. Then use the 50/50 mix of acetone/tranny oil and dribble it between the upper mount and the top of the cylinder, using an 'oil can' that has a pump squirter. Add more mix every hour. 1st thing in the morning , until beddyby time, whenever you have a free moment add more mix. do this for 2-3 days. Yes I know it doesn't look like progress BUT the idea is to get the mix DOWN the 'gap' between the pin and the cylinder, to 'wet' the rust and try to loosen it up. Hopefully after a day,or two..some of the mix HAS made it's way through the rust..
Then remove kittylitter pan, put bottle jack under the bottom of the pin. be 100% SURE the top of the jack is dead centered on the pin AND use a 'sacrificial' old socket between the jack and the pin. If the pin is 3/4", use 9/16" socket( what ever is smaller in diameter). Apply some pressure, CONFIRM everything is lined up PERFECTLY then pump the jack several times. Add more mix, walk away, come back in say an hour, add more mix,pump a couple of times, go away.
Hopefully the pin will have moved. It took me 2 weeks of doing this to a 'stuck' engine,it' started and has run fine for 20+ years now.
Removing 'rust welded' parts requires 'mix',pressure and PATIENCE. Some of the 1st two, LOTS of the last.
hope this helps
Jay