Lots of variables there. Easiest thing to do is hookk t up and hit it with a timing light and see what the curve is. How much advance does the vacuum advance have, when does it start coming in, can you adjust the vac adv to come in at a certain vac etc.
I will try to look into it all closer this weekend. Timing without it hooked up and plugged. Initial, all in and rpm when in. And with it connected, etc. Thanks