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!