Rebuilding an 87 Shelby. This car is a project my son and I started 5 years ago. The engine was completely redone and body stripped and sent for paint. It sat in the bodyshop for another year before being finished. When we picked it up the engine has smoked like crazy. The engine ran fine when we dropped it off no smoke and good power. Drove it 5 miles to the shop no problems. Everything was done except the turbo seals... Is this a problem common to these turbos? The turbo and engine had been sitting in the garage for a couple years before we started the project. It spins up ok and can't see any leaks all cylinders have good compression and it idles and runs ok just an oil smoke. Really hate to start pulling the engine back apart Anyone suggest anything?