The other thing you asked about is how to deal with stuck rings, I've had reasonably good luck with this method. I soaked the pistons in dip parts cleaner ( you have your Gunk, good start ) to soften/remove carbon build up, rinsed that off and then working one ring at a time, took a small ball peen hammer and lightly tapped the the ring into its groove, start at the gap and work your way around. The good sign you'll be looking for is when the portion of the ring opposite where you tapped it in will spring out.
As I said, I've had reasonable luck with this method, one ring would not give up, 2/3 of it was free around the piston, the last 1/3 just didn't want to give up; so I broke the ring and dug it out with out buggering up the groove. I reused these pistons in the first version of my "Mean Teen", went 13.92 at just a lick over 98 mph.
