Hi Roy I hope these pics of my 123's will help you out
Im not to sure if AMT have a parts service . The air tanks as you can see go on the bottom of the rails
the shocks go into the round holes on top of the spring and there should be holes on the rails you may want to look on the inside of the rail there may be some flash over the holes ! As for the tilt ram theres one on the gray truck and it does not attach to the cab . I think that you should be able to work out exactly where the rad mounts from the pics .You can see in pic 8 that thte axel rods shuld be around 3inch long and they do go into the hubs they dont click in but they do go in about 13mm on each side. The wheel and hubs do glue together as in pic 12 -13 . The fuel tanks should go opposite each other and finaly you can see from pics 1and2 where the steering box is ment to go . As i said I hope this helps you out and you get it all worked out AMT instrutions can be a bit vage . If you need any other pics I would be happy to help you these KW's do biuld into great looking rigs but they can make you curse them
Best of luck
Dave