I read that article and find the following very interesting and telling. While I suspect Porsche and BMW race cars have little in common with production models, this quote pretty much says that except for a replica body, there was nothing Corvette about these "Corvettes."
"A Corvette in name and styling elements only, the Corvette GTP (Grand Touring Prototype) was one of the fastest and most exotic race cars ever to wear a red Bowtie. Based on an English Lola T600 chassis and powered by an all-American turbocharged Chevy V-6, the mid-engined racer was a rocketship. At full boost, the Corvette GTP痴 3.4-liter (209ci) V-6 pumped out more than 1,000 horsepower. This amazing machine claimed seven poles in the IMSA Camel GT series in 1986 and won two races. In 1987, the Corvette GTP captured four more poles."