Which engine is Cooler?

440 would be easiest swap. cheaper in the long run. less $$$ more HP. aluminum heads $1500. no special fabrication i'm sure K frame will take a 440 without much work. what engine is in it now?

viper engine you can get 1000hp easily but gonna cost big $$$

newgen swap is lots of twerkin around, double the time alloted for fab & fit