Not running right

[Great one]

Having problem with a 701 hp head 210 in both side but feels like running on one cylinder any help would be great

 

[tntsuperjet]

Try a small plug gap see if it cleans up.
Really small. .010 and if it does you know ignition is failing.
Gap new set of plugs and see how it acts

 

[tntsuperjet]

If plug gap makes no difference may wanna check reeds