Why, oh, why the GPz?

Good question -why go for this engine and frame? The answer is that I'm not sure really. I've always liked the old Zeds, and had a fine Z750 many years ago. I've also got a ZRX1100 in the garage which always was my dream bike. For this project I wanted an aircooled Kawasaki engine and the GPz is a development of the old Zed four cylinder motor - plus the GPz engine also has the oil cooler fitted, which has got to be worth having. I might have been interested in a GS750 but those are getting harder and harder to find these days, and are also fetching a lot of cash. I guess there are becoming classics now.