They DID make an elky for a few years that used a 3.8L. I'd try to dig one of those up in a JY for parts, at the very least the engine mounting parts, possibly the transmission crossmemebers. An El Camino has been done before, I don't ahe a site for it but it's out there. The guy did a front clip from a GN too, had the tail gate where it said BUICK. Really really neat car. Then again, It may have even been a GM prototype.