MSD 2 Step

Ive been wanting to put 2 step on my car for a while now and so I picked up a 2 step module the other day but i have yet to buy an ignition box. What other brands of ignition boxes are compatable with 2 step besides the msd 6 series boxes? Im just wondering because there is a Summit racing ignition box on craigslist thats close by and I want to use that if I can. Any help is appreciated.
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