OK thanks for all the feedback. Iceracer seems there is only 1 Phillips screw in front of that cover down low so I'll check that out.
I went from a foam filter and a 20 slow & 360 main to a K&N filter and back to the stock 22.5 & 350 main. Same mix ratio all along (32:1)
But after doing this is when this happened.
Its too dam cold here in WI to be doing much now but I will surely check the jetting right away out in Glamis on a new plug to see if I'm on or not.