Ive used the autozone style but I loathe it, always cuss a lot.
Advantage is you don't need compressed air, but so clunky to use.
The napa style works good on just about all stud rockers. I've had mine for 36 years. Really easy but you do need compressed air. Even a little compressor will do, you don't need CFM's, just 90-100psi and it goes fast. Make sure each cylinder is right at TDC first or the air will spin the crank, Surprise! Some use this tool without air, just stuff a rope in the spark plug hole, again that works but not my favorite way.
Good to hear the timing worked out.
I like the Ford umbrella valve seals if you have the room. That's the best you can do I think without pulling the head and machining it.
