Naw, if I went that route, I would do one cyl at a time. Bring it up to TDC and then pour the solvent in from the top and let it sit overnight.

BTW, so the last time I did mine I used a torque wrench , as I tend to over horse and break things, and VOILIA! two broke anyway. Right at the threads. My guess, at least one was already given stress risers at that radius by someone over tightening them on the way in.

I punted and let a mechanic at $60 a hour whittle the broke GPs out of there. He did. He made up a tool that pulled them out, after drilling away the threaded area.