Here's my curve -- remember I have aluminum heads. The light silver and blue combo is tried and true. My all in timing is 35 degrees, so I use the silver bushing and that translates to around 10 at idle. The benefit of that is very easy cranking. Make sure your colored bushing and initial timing add up to what you want, then you can monkey with your springs. This, of course, assumes you have the MSD bushing and springs.
