Holley 600 carb help

Correct. Spring goes in first on bowl, with bulge fitting down into the cover.

Check your total timing before bumping up the initial. You may get into an area where it will ping. Some big blocks can handle 40*, but that's not usually the norm.

If you have any questions ask... :)
Thanks again . . . well, I have to admit I'm very old school, never did anything other than initial timing. I will have to "school up" to do anything more. Any threads or sites I can use? Rog