The VR-4 caliper is different (rotor and caliper are larger) than the Base Model's. The Base Model 3000GT caliper is the same as the GSX caliper just like thedawg said just make sure to get the right flex lines and he'll be all set.
________________________________________ 95 Eclipse RS - Rolled 96 Eclipse GS - Traded 95 Eclipse GSX- Sold 01 Blazer LS 4.3/5spd dropped and clean DD 88 Camaro RS 361 CID with a 6spd and a bar 10 second street car on motor.