You'll want a quick timing curve. Mechanical advance should start coming in around 1200 and be "all in" by 2400 or 2600 (max), because of the high gears/overdrive you're running. Your mild cam may like 14 or 16 degrees of initial advance, and around 20 degrees mechanical on top of it. Your total would be around 36 or so, and a lot of 350's like somewhere around 50 or 52 including vacuum advance.
How did the manifolds improve your combination? I'm curious.
Thank you for the response!
Because of the fitment of the headers, I experiences all sorts of heat related issues. Melted wire boots, baked plugs, etc etc. I was forced to use "shorty" plugs, and even with heat wrapping around the wires, boots etc, the plugs were still badly baked, and the engine NEVER ran well. Difficultly starting after running for a while, misfiring, etc etc.
When I replaced the headers with OEM manifolds, it eliminated the heat issues, and I am now able to use regular size plugs.
The car runs much, much better now, not to mention, it is much less noisy :^)
So if I am understanding your recommendations, and going off the information in the MSD installation manual, I should use the two Silver (light) springs, along with the Blue stop bushing (@ 21 degrees)?
Is this correct?