Does anyone know where i can find and purchase a Viper r12? i want the 12 V engine...?? i want bright red??

they dont make one... well sort of...
dodge worked with corvette and developed a v12 engine for the viper, but that is as far as it went. (and yes, corvette did have a v12 prototype called the 'falconer' in 1992).
There is a rumor that chrysler was going to use the m-benz quad turbod 6.0l AMG v12 in a viper, but, the truth is, they were working on it for a producation for the ME Fourtwelve, a chrysler prototype that was going to production in 2005, but has since been scraped.

Now on hennessey performance. I would NEVER IN MY LIFE EVER have anything to do with hennessey. here
http://www.carforums.net/printthread.php?t=15083&page=1&pp=40
http://www.carandmodel.com/forums/archive/index.php/t-2486.html
http://www.svtperformance.com/forums/showthread.php?t=303159&page=1&pp=25
http://www.automotiveforums.com/t83267-problem_with_j__hennessey.html
http://vca2.viperclub.org/forums/showflat.php?Cat=&Board=UBB2&Number=5677&page=0&view=collapsed&sb=5&o=&fpart=3
http://www.chargerforums.com/forums/showthread.php?t=17849&page=3
http://www.automotivehelper.com/topic2011.htm
http://www.socalstangs.com/forums/showthread.php?t=10684
You hear his name and you assume he does good business, but the reality is, he will screw you faster then a brazilian transvestite.

No such thing as a V12 viper.

Those Hennessy "Venom" versions are the fastest ones that you can buy to my knowledge.

http://www.hennesseyperformance.com

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a viper has a v10 and if your trying to say it has 12 valves instead it doesnt

V12?

ebay motor

www.autotrader.com
www.ebaymotors.com