Equipped as an option on the Gran Sport 455, only 400 of the GSX Stage 1 packages were sold in 1970. The package boosted the performance of the lightweight 455 engine to 360 hp. That isn’t too impressive until you hear about the GSX Stage 1’s 510 lb-ft of torque. That was the highest torque output of any American production performance car until the introduction of the Series 2 V10 Dodge Viper in 2003.
That’s why builders of the 240sx, FD RX7, and all kinds of custom applications have used engines from the LS family they’re all durable, well-built, and cheap to modify.
If you haven’t seen this video before, prepare to want a Smart for the first time in your life. One of the oldest car videos on YouTube never ceases to entertain, and the fact that this beast probably gets better MPGs than a stock Smart only adds to the absurdity.
These RWD monsters are still somewhat pricey due to rarity compared to the sedan and coupe models, but you can expect to find some examples in the ballpark of $45,000. That’s really not bad at all though when you compare this car to the likes of the Porsche Panamera and wagon offerings from Mercedes AMG.