Thermostat replaced.
With the handling of a Camaro, the roominess of a living room, and a top end of 137mph!; What else could you want!
Heavy Duty tranny, suspension, oil-P steering - tranny cooler. You can beat the bag out of it and it will never bust! Smoke the local hero in his Mustang 5.0 (sorry, it's really a 4.9)!!!
The 1991 Caprice Police Package did not come with an external tranny cooler stock. This was added in 94 along with the option of the LT1 engine. Further, I doubt very much that a stock TBI 350 Caprice would be able to beat an equally stock Mustang 5.0 in an acceleration test. An LT1 Caprice, yes, but not a 1991.
Otherwise, I highly recommend the Police Package for durability, and own a 1990 myself.
FOOTZ has a 1990 9c1 also. The baddest car around here is my 9c1. The fastest I've been is 137mph. It will go 0-60 in 5.5sec.
I have just installed a five speed in my 1991 Caprice 9c1, it hauls...
I just bought a 93 caprice and just stuck the basic bolt ons, on it and it made a huge difference. Very happy with the car oh yeah it hauls.