So I have been thinkin about trading out my 4.6 for a viper 8.3 v-10 or just the gt500 5.4. Its a tough adventure but i rather sell my 4.6 while its still new(4000miles). What do u guys think? A slightly used fully built v 10 is about 10-12k and i havent even checked on the 5.4. would the stock rear end be able to hold the power of the viper engine? Just give me a honest answer, i feel like im abadoning ford if i go for the v 10.