Thought I'd toss in a few photos to get you started.
Top ones are of the tool used to set the length of the push rod in between the booster and master cylinder. You may have noticed the hex end is adjustable.
It was interesting how much it being out can change the feel of the pedal.
Second pic is just to have handy when you're putting everything together.
As for the feel, that's a big difference compared to newer cars, takes a little adjustment (and leg strength..lol)
When I redid mine, I went with steel braided lines, less hose flex and longer lifespan. Old/rubber hoses tend to swell when pressurized.
Engine vacuum (higher cam lift) can also weaken the booster assist. And keep in mind the little port in between the tanks in the master cylinder. If the rear system is leaking, it will draw front the front.
There are members that have gone to upgraded systems with much success, and depending on which route you want to go, there are lots of people here that can help you with anything you may need...... I'm sure more will be chiming in soon.
Best of luck, Scott.