I think that is real close - but why do that, we have had 4 guys trade in their ZR1s for Vipers in the last 6 months and they are all happier with the Snake. Just think how much it will cost you to get the Vette and then trade it in in a few weeks for another Serpent. Save yourself the bucks -- heck with your mods it should probably outrun one anyway.
If you track the car, no heatsoak with the Viper, and plenty with the Corvette. Gee, look how much money I just saved you. Get up, take your lady out for dinner, some drinks and enjoy the evening , you just came into a bundle of money,ha!