What years did Buick make the Riviera with the curved back window?

When I was 12 my dad purchased me a very used and beat up Buick Riviera for us to restore. We never got around to it because he passed away. I am now older and want to find one similar to purchase. I know the 1971 model shown on the link below had the curved back window but what other years did they make it like this?





http://www.google.com/imgres?imgurl=http://www.oldcarmanualproject.com/brochures/1971Riviera/71BuickRiviera.jpg%26amp;imgrefurl=http://www.oldcarmanualproject.com/brochures/1971Riviera/index.html%26amp;h=602%26amp;w=600%26amp;sz=74%26amp;tbnid=n87P4KwnJNrZ0M:%26amp;tbnh=225%26amp;tbnw=224%26amp;prev=/images%3Fq%3D1971%2Bbuick%2Briviera%26amp;zoom=1%26amp;q=1971+buick+riviera%26amp;hl=en%26amp;usg=__WE4DZAKIB_ZoFoDE8uVkxQL4xFA=%26amp;sa=X%26amp;ei=EQU2TbuwBoa8lQec6fG3Cg%26amp;ved=0CBoQ9QEwAA|||You are correct ,yes they were built in 1971 1972 1973 only called the boat tail,


1971 was really the best because it had slightly more power then the 72 and 73


all three are real classics today,all had the 455 ci buick V8 great motors, but the 71


had 315hp,72 had270hp,and the 73 had250hp..


So try and get a 71 or72 rust free original,and you can not go wrong


you will double your money in 10 years as they are going up in value rapidly,