408 ignition curver advice

I read through your thread a few days ago (great info!), as I'm gettin' back into my ignition and timing curve stuff again. I'm sure you remember chatting with me about it a couple years ago, which I greatly appreciated.
Man, did life ever get busy and crazy and challenging for a good long while. I barely had any time to even drive my car, much less work on it. I caught a break this Spring to get back on some stuff with my car. I should be receiving a curve plate and springs kit from FBO Ignition tomorrow so once I get my initial and total dialed in, I'll be trying to add in some vacuum advance on top of that. I added a vacuum advance limiter screw in the side of the dizzy a couple of days ago also but it's still plugged off for right now.