Bigger Brake Booster?

[LSUMurse]

I am about to add power brakes to my manual brake '68 C10. I will eventually be towing and/or carrying a slide in camper, so I am thinking of going ahead and putting in a bigger brake booster (keeping it drum/drum for now). I believe the booster and brackets I have are from a '71 (I should have the definitive answer on that shortly).

I have read quite a few threads and have some questions.

Some threads say that the master cylinders are different on the trucks equipped with bigger boosters. The reseviors for the front and back brakes are reversed. Is this true?

Also, are there any upgrades or changes that need to be done to the rest of the braking system once it is under a higher load?

Thanks,
Stephen