Personally, I would base my switch on what truck is in all around better condition. Keeping a vehicle perfectly authentic is not an easy task, and in the end does it really matter that much? If you should ever decide to sell it, I can almost bet the buyer will be looking at the truck for overall condition and driveability, not whether the numbers match. These aren't old muscle cars or antique firearms where people look for all matching numbers. These trucks, as in old military firearms were used, abused, and serviced during combat in some situations. Parts were exchanged in motorpools around the globe. As a military firearms collector and Army veteran, I know alot of weapons were kept in service with parts from other weapons. Same way with MV's. The way I feel about authentic, and original is simply, are all the parts real and made for that application, be it a truck or weapon. In a perfect world everything would be...well, perfect. Sometimes it's just not meant to be. Keeping these vehicle alive and well, and on the road in public view is my personal main goal. One of the reasons I've shyed away from the car and especially the muscle car scene is because at shows/cruises I got tired and to old to try and keep the car clean and shinny and then have some judge gig me on a speck of dust under the wheelwell. Our trucks are rugged looking and the truth of the matter is, alittle dust or scratch or piece of dirt somewhere only adds to the patina of the total look. Whew! I've got to get down off my soapbox now, I'm feeling dizzy. Again, this is only my opinion, for what it's worth.
militarypotts Spec/4 Military Police, Vietnam Era, "Does the noise in my head bother you? Welcome to the Twilight Zone!"