From what I have heard is the PWK is easier to jet and dial in. I have them and yes they are easy to adjust. Never screwed with the PJ's. sorry! I have 35's on my stock stroke and it runs very well.
damn,that sucks dude.You need like 21cc domes depending on your elevation to run pump gas.Do a compression test when you get it fixed.Anything below 150 you should be safe for pump.
320's,310's,300's,290's, You already have 280's.Air screw should be good at 1.5 turns out.Needles in the middle clips. All you can do is try that out and see how shee runs.