I agree the GN's are awsome cars. While doe joe that said buick never made anything worth while other than the gn.........I guess he's never came up against a simi stock 455 before. With a couple of light mods.......these can put even the heaviest of cars into the 13's very easy. You have to realize the 70 stage1 was teh fasted muscle car built that year. It was also the heaviest as well as the lowest geared ( 3.64 ) was the highest gear ratio offered. That's preaty amazing and motor trend magazin will back it up. The also made the fast muscel car in 71 and 72. I happen to own one of 680 GS 455 built in 71. I just completed the frame off resto last year. The car is currently in this months issue of Car Carft. It's up for the "win your car in car craft contest" You can see other pictures of the car at
www.streetheatcarclub.com. Let me know if you have any further questions about GS's or GN's. I'm fairly smart about both models of Buicks.