60hp+ should be quite easy to get using the parts you have. The only parts you might find handy to have are the HRC jet kit.

The HRC jet kit comes with 3 different spec needles as well as a new X and Y air corrector and a number of main jets.

Fitting the HRC jet kit will allow you to set the jetting up much better than using the stock needles and so should give you an increase in hp and engine response.

What JHA pipes are you running?
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If I have to take the carbs off once more...