Here's some info that will help to identify the calipers. The brackets were designed to use the 1g 3kgt vr4 calipers (1990-1993.5) combined with the 2g 3kgt vr4 rotors (1993.5-1999).
1) Identifying the right caliper:
The distance from the closest bolt to the center of the closest mounting hole is 2.5" (see pic below).
If you measure this & it's longer than 2.5", then you have the later 2g 3kgt vr4 calipers. They will bolt up to the brackets but you'll come up ~1/2" short on the rotor. This is because the mounting ears are longer. You can get a larger rotor to solve the problem but I don't know if this will impact wheel clearance any further.
2)How to identify the correct rotor:
The correct rotor has holes between the hat & the surface area of the rotor & measures 12.36". If your rotor doesn't meet these requirements then you have the wrong rotor.
Please refer to the 1st picture in this link .
Don't be fooled by the 4 lug hub. These rotors are 5 lug & I redrilled them for 4 lug.