I noticed the carb neck was moved off center a significant amount also! 3 needle carb and 3 weights in the crank makes me wonder what's up with all the changes.. I'm not a nova guy so I can't say if the carb is anything new but that carb angle change is deff to noticeable to have missed in the past. I have a hunch that 'PAT' printed on the carb neck refers to that in some way also.