HEI distributor...

Yes, I’ve never even attempted it with mine. I believe there isn’t anything it wouldn’t interfere with in it. And I can’t complain the least about my orange box I have in place at the moment. A friend gave me a 6AL I’m going to try but I really don’t expect to notice any difference. The Orange Box with a Blaster2 coil is firing the plugs at .043 without issue.