Another master cyl thread, with a difference

My M715 finally arrived and it's great, will do a thread on it soon. In the meantime I'm trying to get it ready for the road but a leaking master cylinder is holding me up.

As I'm going with bigger tires I want to upgrade the brakes a bit but being in Australia I don't have access to napa stores or many of the other parts sources you enjoy in the states, Summit will ship to Aus at pretty good rates though.

I'm thinking of a J20 dual diaphragm booster.

https://www.summitracing.com/int/par...20?prefilter=1

Remove the master cyl and put it on the shelf for the day I do an axle swap, then use one of these for drum/drum application

https://www.summitracing.com/int/par...20?prefilter=1

https://www.summitracing.com/int/par...20?prefilter=1

I'm very open to thoughts and suggestions.

Cheers

I know that the 1489 master cylinder has been used successfully in the M715 before...the booster, I am not sure if it has or not...but seems to me that it would.