[SS Tim]

Nice truck Jacko, But it appears to have issues. So here is what I'm seeing in trying to answer your questions.
#2 The color code is 466 or 506 Spruce Green/Dark Olive Green and 521 White. The other two tone codes of this combo. were 564 and 589. Based on this code I'd say this truck only had a white top and the side panels were added later. Also of note is the fact that the lower body side molding inserts are woodgrain and not the correct black. Additionally the DF2 Camper mirrors are missing as well as their holes. New paint here.
#8 The truck is a regular C20 and not a Longhorn. Its easy to tell from the pictures but the glove box code is the confirmation. This truck is model designation "CE20934" if it was a Longhorn it would be coded CS21034 or CE21034 for a C20 or CS31034/CE31034 for a C30. It breaks out this way "09" has a 54" cab to axle dimension and "10" has a 60". The short beds are "07" that have a 42" dimension.