So he'd have a modern-looking early 911, where the "tail wants to wag the dog".
That sort of behavior can be tamed to some extent, and someone with some experience can drive around the rest. It could be very exciting (and possibly fatal) to get that experience, of course.
Like you, I don't understand the point of insisting that everything be in the rear of the car. It would make more sense to me to have the weight somewhat balanced front to rear, even though the stock CRX has much more weight up front than in back.
But just because it doesn't make sense to me doesn't mean that he cannot or should not do the work. I just want the OP to understand the magnitude of the task, and point out easier options in some cases.
-soD