Which engine is Cooler?

how heavy is the actual dodge viper in comparison to your 3800-4000lb truck? I must have missed the part about mpg being important. With that being the case, an Efi 440 or boosted Efi slant six would be pretty cool

Depending on which generation Viper you compare it to it ranges anywhere from 3,280 on a first generation roadster to 3,460 on a 4th generation SRT-10.