You should have a plaque in the center of the dash with your production number. I'll post pics in a bit. If I recall correctly (providing you have a copperhead truck) Daytonas were the only trucks they painted that color that year. (Please correct me if I'm wrong.) Daytonas were only offered in silver or copperhead, So check your paint code. If it's silver it will be much harder to distinguish as any ram could be had with that color. They only made 5k Daytonas, and I don't believe there was any indication in the VIN, it just read as a 1500 hemi. It's another reason the value didn't hold well with these special units cause there is no definite way to tell from the Vin. Ironically enough it's the same way with the 69-70 winged cars.
Now here's the crap part about it... Chrysler did not keep records or good records anyway of how many they ACTUALLY made. And the serial numbers on the dash plaques I have been told we're not sequential. So while they said there were only 5k manufactured...only for 05. Silver was the rarer of the colors, with silver 2wd qc being the rarest of the combinations. They all had hemis and they all had 3.92 rearends. some of the serial numbers might read over that (i.e. #1345 might be made after #4200 or they may have never made a plaque with #1600 but did make one that was #5200). I know the rumble bee guys are really pissed about this cause it hurts the values of what would be really cool rare trucks.
Other things to look for, if it doesn't have a wing... check under the bed rail at the back to see If there is a hole to mount the wing. Mine was bondoed over at some point but you could still feel the hole on the bottom under the bed rail. If you don't have the bumper spoilers check to see if there are holes there for them... the interior trim should match the body color (silver or orange). Should have dual tip exhaust on the passenger side exit. Rumble bees, and sports only had one tip. I can't think of anything else right off hand...
Good luck man, super cool trucks! I miss mine...
Matt