Ok, Justin...I seemed to have lost my notebook with all of our setups in it (I am still looking, though!), but I did find a couple of sheets with some notes on them.
For plugs, I run the regular gap, and regular old AC-43 plugs...nothing fancy. You need to install new plugs, and check them after a run, as racing and driving are 2 different things. Thats the ONLY way to get a true reading. As for gap & dwell, we run all stock settings, and it seems to run well with them.
As for jetting, this will also depend on your plug readings. We are running the power valves, and our jetting is at 78/86, but every set up is different. Your 6.5 power valve sounds closer than the 3.5, but I can't remember what mine is. We are running the yellow secondary spring (the longer one) as well.
As for timing, you want as much as you can get, and still be able to start it good, and not get any detonation. We have found 39 degrees works well on our cars, but once again, every setup is alittle different. Pete told me he usually runs around 40 degrees total, and 20(?) initial.
Valve lash is another variable that is kind of dependant on the overall combo. We are currently running 24/28, and it seems to work well, but I have been known to change it up a bit.
The above may not help you out much, but LIke JoeC said, a lot is trial and error as some engines like it one way, while others like it another. But, it sounds like you are already in the ballpark, so just keep fine tuning it.
I also noticed you said you were heading to Michigan for the PSMCDR. Have you ran the car before at the track? What tires are you running? What day are you planning on getting you Michigan? Pete, JJ, and I are all competing in "Certified Stock", so we should all be there a day or two early. We are all easy to find!
You need to read the May 2001 Muscle Car Review about Pete's dyno test on his L-72, and then check out this thread
https://www.yenko.net/ubb/Forum1/HTML/000307.html
[Edited by Chevy454 (06-20-2001 at 11:45 PM).]