Should work… Make sure the throw of the master cylinder rod that comes off the brake pedal is enough to engage both ports of the dual reservoir. I had converted my car to disc brakes and also the dual master cylinder. So I had to do some re-routing of the brake lines. I made the rear reservoir the supply to the front disc brake using the old spitter proportion block (Back fed it) to create the front circuit.
Then I ran the front reservoir to a single line with a manual brake proportion device to balance the front and rear percentage of braking, Luckily I never had to adjust it as I happen to get the right front rear percentages of the fronts carrying most of the load (60% approx) and the rears engaging later (40%). There rears never lock up before the fronts. Got lucky..
But back to your question yes it should work fine, I used a mid 60’s Mopar A body dual reservoir and it worked fine. Your selection of a later MC might work too.
See the link I posted to my thread on my restoration of my braking systems. repairing door armrests
John Q.