Depending on the years, the J-block can be in a different place, so it may have to be relocated. Swapping lines or bending new ones is cheap and easy. Don't let it scare you.
Before you open the system,block the brake pedal down a couple of inches to close the compensating port and thus preventing the system from draining.
This would be a good time to replace any/all aging flex-lines, and freshening the fluid as well.
Some fellows are hesitant to work on these hydraulics, but really, this is not rocket science.And also really, this is probably the number one most important system on your car, and should be in tip-top condition; at all times. If you get in a bind(pun intended), we're here to help.
After working on one car's system, you will wonder why you were ever timid about doing so.