That should work okay. Incidently that pickup choice is the same as what Westbury guitars were fitted with. I'll have a look what pots were used in mine...
500k. But there are large caps fitted that may change the value.
One thing, the DiM super distortion is just that, if you want a humbucker that will 'clean up' well with the volume control a better choice would be a Seymour Duncan 'Pearly Gates' or 'JB'.