Possible AM reciever
 

http://www.airtronics.net/92726Z.htm

would this work?

the shredder form hitec is smaller, still dont know if they are small enough

hmmm.....i use FM......just so i dont have to buy another controller...(i fly rc planes, they use FM).........

That is really big. The site says its dimensions are 1.42L X 0.99W X 0.63H in inches... If you havent already go buy a HO truck that you would like to convert to RC, most likely the Man 5T, since that has a alot of room, and then measure the dimensions of the back end, to see if you can use the components you want. You will find that there arent many (if any) AM receivers small enough. I think most people in the US are just using airplane electronics.