I don't think you will have any options for different suspensions, because it's really only about 10"s longer (the stretch 23 like rpm sells, or the 27 that is), and the 27 is about 3 inches wider. In my opinion the front and rear suspension options are exactly the same with both. I will tell you I'm only 5'6", and I have the rpm stretch body, and I've sat in the standard body, and there is a WORLD of difference in leg room even for a shorty like me. Some say they don't like the look of the longer body, I personally do. If you are going real low with the car like I am, the extra length is even more critical since my tranny will be almost sitting at floor level. The extra length gets your foot room past the bell housing which takes up a LOT of space in a low car. It's pretty much just your preference in body style and stance. Chassis are pretty much the same.