Spark plug gap with MAD 6AL

I'm running a MSD 6AL on my mildly built 360, .030 over, Comp Cams Xtreme Energy 230/236 hyd. (.230/.488- .236/.491), Edelbrock aluminum heads 650 Holley Brawler carb. Car is not driven much, less than 200 miles last year. Running NKG 4554 R5671A-8 plugs. Started having hard starts, running rough and blowing smoke until warmed up. pulled the plugs and they were black. Pretty sure my issue is just starting it every once in a while and not driving it enough. Question is what plug gap are you guys running with MSD boxes? I've read up to .050, but looking for opinions. Thanks in advance.

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