New carb finally arrived, with pic

Got new carb on and sorted out. Went for drive, has a light miss at cruise rpm, runs good wide open
Added power valve in front, took out plug. Used 6/5, and 78 jets in front.
Gonna try 80’s and try a quick cruise again and see how it acts at cruise rpm.
Not sure if 4/5 power valve would be closer.. Didn’t have a vacuum gauge handy.
Try one thing at a time, front jetting first.
Old carb did I think have a 4/5 in it, have to check that tomorrow.