Sandman, you think this mod might work for ya?
V-10 Vic Basically, they toss the wimpy v-8 and get the v-10 in there, they convert it to propane too but you could probaly skip that part

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BTW, the Caprice cop car is nice. The 9C1 uses V-rated tires and comes with the LT1 engine, ummm LT1. Oh, and when someone talks Impala the only years it was made in recent memory are 94-96. What you see on the road now is just Chevy seeing how far they can go before they get a savage beating for trashing a great car.
I think you guys should buy used 9C1's for three grand and use the leftover money to fix them up. Drop in a super charger and you get 400+ horseies or so.