not sure on the price...but kragens/autoworks has them.
Try d&d in wixom MI....they have brand-new ones pretty damn cheap...also rebuilt cobras for i believe $799...check for their ad in 5.0, or mm&ff
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4.10's,long tubes & 75 shot...Goes 12.50's
Check it out at
http://www.burnouts.webprovider.com