The clip orientation on the needle valve is super important. Some people (including Cliff) say you can ditch the clip altogether. I'd rather have no clip than an improperly oriented clip.
If you're buying a rebuild kit from Cliff's (which I do recommend), you should also buy his book. Also,
this thread is a good reference. I recommend pulling the idle tubes so you can clean under them if you haven't done so before. Trash builds up there and can cause issues. You can buy new idle tubes from Cliff if needed. If you're a glutton for reading carburetor manuals, Rochester Carburetors by Doug Roe is very detailed also.
I'm actually going through the same exact thing right now with my QJ - flooding at idle. I'm adding a fuel pressure gauge to check out the pump, and also doing another rebuild with Cliff's parts.
