Which front SN95 disk do you actually have? the 94-98 66mm single piston units, or the 99-04 dual piston units?
With the rear drums, you really want to be careful about MC selection and not compare your car to the setups where guys are running rear disks. There is a little math behind the choice that will maintain proper pedal stroke ratio and feel. Unfortunately, changing brakes while leaving the rear drums doesn't make things easy.
I can show math here, but long story short, with the rear drums, your best choice is a stock MC. Pedal feel will be closest to stock with the 99-04 2-piston units as they are the closest of the two 11" SN95 setups to the stock 60mm calipers in terms of piston surface area, and a little bit softer with the 94-98 66mm calipers. Ideally, a 7/8" bore MC would probably be as "big" as you want to go here, but i'm not aware of one that will bolt on the 86 style Booster.
Don't compare your setup to setups with rear disk brakes. It's apples to oranges and you cannot go by why those setups use. Rear drum wheel cylinders have very small surface area compared to rear calipers, so that's why the stock MC is so small. The stock MC is roughly 0.83" in OD. Changing from that to a 1.00" OD bores is a HUGE jump. You're pedal stroke will be short, and leg effort will be very high. The larger OD you go, the more fluid you can move per linear inch of stroke, which means actual travel distance will go down.
When you decide to change your brake setup, then change the parts to match.
I wouldn't change the booster either. Your new calipers have a larger surface area compared to the old 60mm units you replaced. That fact alone, with the stock MC, means you will have reduced pedal effort and more hydraulic advantage. I would not put a cobra booster on. You're brakes will feel VERY over-assisted.
TL;DR: Stay with stock MC and booster for now.