install rear, trans, shaft, and turn motor sideways, and realize you just ruined a perfectly good car.

If you're actually serious... there's a lot of work that has to be done to make everything fit. 4G63 is designed to be put in a car sideways and therefore the transmission side of the motor is not designed to accomadate a firewall being that close to it. There's a lot of tricks you gotta pull to make it all work.