Even if it fits it may not be safe to use it. The collapsible shaft is there for a purpose and if it cannot collapse to at least the length the system was designed for you may not want to use it.
since this is a retrofit shaft from a different vehicle you are already using the shaft on a system that it was not originally designed for. So i would think the safety aspect of using the 4wd or 2wd shaft is not really of much concern .