Summit has their own brand of box out now, bought one last year for my engine run-in stand,works great,the kit has adapter plug-ins for most any distributor including MSD......
Great price and soo far, good ignition box.....I like the rotary dial for the rev limiter,you can set it at any rpm you want......
Summit Racing SUM-850610 - Summit Racing Street & Strip® Multi-Spark Digital Capacitive Discharge Ignitions - Overview - SummitRacing.com
David