Dont be hunting a Kit..
Solve the problem,, with THE parts ya need,, Its not a Rochester Quadrajet, and that Kit with
The Answers in it is Very elusive.
Youll get jets and crap youll never use,,
Figure out WHY that valve is leaking,, Its the needle, or the seat, or junk in it,,
How old is it?
Whats the back story?
A cleaning might solve it..
You might have a float that sunk, or just crap in the valve,,take it apart, slowly and carefully,, the pin the float swivels on only goes one way, dont get horsey with it,

Those Phillips Looking bolts that hold the bowl on are JIS, and a #2 phillips doesnt sit down in the slots well and Will most assuredly strip them. Recommend start with a good penetrating oil, let sit, hours if not a day, add occasionally, Kroil is an actual good one,, WD40 isnt in the same league.

You can grind the tip on a Phillips until it sits down in the X and engages fully.
Or Buy JIS driver to fit/
Replacing the bolts with SS Allen heads is a good move and allows easy bowl removal on the bike, using swivel Allen wrenches.

I like Berrymans B-12 carb cleaner spray,, Be aware, a tiny drop in the eye is gonna Be REally Painful,, Protect yourself, Good ventilation is a must,, Gloves are great,, but if not, no rings or watches,, B12 between those and you will burn,
You can break the tabs the bolts go in if ya get too horsey,, Be sure to back them up if youre smackin on it,, like a handheld impact.
An electric, 1/4" impact is great here.

Its less time consuming to go slow than to hurry and make it worse,,