Help with Master cylinder and Brake Booster Sizing

[Paraman1]

So I am planning to swap to a Corvette 13 inch front brake setup and eventually ad rears as well on my 64 El Camino . My current brake booster and M/C is giving me problems so it needs replaced prior to the spring driving season . I am leaning towards keeping it a power brake setup mainly because its primarily a street driven vehicle but could be persuaded to go straight non power brakes . Since it is currently a front disk rear drum setup and will probably remain that way for a while I am thinking of a disk/disk Master cylinder setup with a proportioning valve so that I can eventually convert the rears to disk . Just curious what Master cylinder (size and brand) and power brake booster (size and brand) you all would recommend . Also curious what your thoughts as far as whether you would go power brakes or manual and why ?

Thanks in advance for any help you can provide .