Brakes are hydraulic. The master cylinder must be a match for the bores.
You can't slam random stuff together and expect it to work. It's kinda like buying a random set of pistons and expecting them to fit your engine.

Find the diameter of the bores in the calipers. You can probably look them up on Wilwoods site if you have the part numbers.
You need to know the diameter of the master cylinder too.

Once you have that information share it with us and we'll know more.

We are brothers and sisters doing time on the planet for better or worse. I'll take the better, if you don't mind.
- Stu Harmon