Tim,
A very cool car which brings back lots of memories as I both drove many of these as my company car during my quarter-century as Pontiac dealer (though I preferred white and red), and sold over 200 of them during the time they were produced. An interesting car that was produced after the last big block Pontiac engines went out of production in 1978. The last true big block Pontiac motor produced was the 400 in.³ big block 4 barrel V-8. A handful of these were held over and put in to four-speed equipped Trans Am's in 1979. All automatic transmission Trans Am's built in 1979 were equipped with the Oldsmobile 403 V-8 that had siamesed cylinders and was not nearly as desirable as that big block Pontiac 400. In 1980 the Trans Am used the 301 Pontiac small block V-8 equipped with an air cooled Garrett turbocharger to try and re-create the big block feel of those old 400s. There were quite a few turbocharger failures because that Turbo was not water cooled. Every time you shut the car down you should let it idle for at least 30 seconds and if you have been running the car hard, let it idle for at least a full minute. Buyers almost never did that. They would drive the car hard and that air cooled turbo would be blistering hot. The turbocharger in the car uses engine oil as its only source of cooling and upon shutdown whatever oil is in the Turbo stopped flowing and was cooked into a hard varnish by that white hot turbocharger leading to premature failure. Let that air cooled turbo cool down before you shut the engine off and you'll enjoy a long and happy life with your new toy. It would be appropriate to toast your beautiful new car with a can of original Coors beer!!! :cheers
All the best.
Chip