Default VZW: Revert to 4.2?

If I manage to obtain the key for my bootloader and unlock my 4.4.2 phone, would I be able to flash the original Moto/VZW 4.2 onto it?

I liked the battery life a lot better before 4.4.2, and I'd prefer to go back to 4.2 until they work out some of the power issues.