Well I did some searching and it looks like his 93' has a 5.7-liter V8, developing 180 horsepower and the 94' got a high-performance 5.7-liter derived from the Corvette's LT1 V8. Later in the model year, an aggressively styled, performance-oriented Impala SS joined up, carrying that toned-down LT1 V8. The 5.7-liter V8 was optional in 1992-93 wagons (standard in '93 LTZ sedan), produced only 10 more horsepower than the 5.0, but 45 more pound-feet of torque.
For 1994, a 4.3-liter V8 replaced the 5.0-liter, hooked to a new electronically controlled transmission and making 200 horsepower. At the same time, a potent new 260-horsepower version of the 5.7-liter V8 became optional--an evolution of the LT1 engine in Corvettes. That V8 was standard in the Impala SS. For its final year (1996), torque output on the LT1-based engine peaked at lower engine speed.
So is this engine / car in high demand??