96 caprice engine

i have a 96 caprice which i got from a police acution, i was wondering where i can find out what engine it has, also i was considering getting straight pipes for it(car runs on propane) would it be worth it? and what will straight pipes do?
thanks

Hi. Check your VIN's 8th digit.
W=4.3L L99 engine
P=5.7L LT1 engine

Bruno.


i have a 96 caprice which i got from a police acution, i was wondering where i can find out what engine it has, also i was considering getting straight pipes for it(car runs on propane) would it be worth it? and what will straight pipes do?
thanks