i have a 50 year old craftsman timing light, and it works with MSD boxes just fine...you're not trying to set it with a vac advance hooked up are you?
you need around 10-12 at idle, and then it should advance to around 32-36 fully advanced. thats with the vac advance unhooked, and all ports plugged on the carb. If your distributor only has a mechanical advance, then get it to idle, and see what it goes to when advanced. on street cars i go with the numbers above, on my race car, i lock it out at 36 with no advance and leave it. but those are two very different animals.
you have some odd things going on in your combination...the single plane intake, and the "high lift" mysery cam aren't doing you any favors on a driver.
