My daily driver is an LT1. I've been thinking about getting a new dd, maybe an '01-'02 C5 targa. The old LT1 is so reliable though, there's really no reason to park it.
To the original poster. You've got a nice car and plenty of people would commit a felony to own it.
You should sell it outright and finance the c5 if you can't make up the rest. Don't trade.