Where did you see it?
Quoting from a March 1991 Car Craft article, the original engine scuffed a cylinder while under warranty. There were no CE ZL-1 engines so a complete production engine was installed. The dealership [Whit Chevrolet] kept the original engine for many years. At the ZL-1 reunion at SC-Indy July '89, someone from Whit was there attempting to re-unite the two. Took a few years but finally got done.
Original MSRP was probably $8,092 or about double the average Z/28.
Everyone who subscribed to Super Chevy in 1983 had a shot. Second only to one of the '63 GS Corvettes, advertised in Hot Rod for $5500.