I actually have attempted the combination of the two kits.. It is gonna be costly to go your route. The ertl kit that has the rubber duck items you need is gonna go for nearly 100 to 150 if your lucky.. AMT's kit is gonna be 75 to 100 and its an R600, which has a shorter hood. The sleeper is gonna have to be scratch built, plus order 2 hole wheels from someone! I ended up selling what I had on ebay & bought the AITM kit for 169. It went together nice & had everything you need!
Thanks to everyone for their kind comments.. As for the trailer decals Angelo, they go on pretty nice. It is almost impossible to get out all of the Air bubbles due to the ribbed trailer. I actually put the trailer on its side, put a heavy layer of water down first before I applied the decal. its a 2 piece decal so I would do one section, wait a few days, then the other, wait & start the other side. I was worried the would rip, but jerry did an amazing job making them!