Hey bud, I traded and recieved the truck on these boards and when I recieved it everything was in the box to rebuild it (good sign it was beat on ) But I do know that my local hobby store can order these parts any LHS should be able to order this for you. As far as how many gallons I dont know I have never ran a car that long that I've needed to rebuild it, but this motor was very sluggish and I was gonna get rid of the truck because it was beat but since the motor rebuild went so well and it is as strong if not stronger (because I polished and ported it) than a new one so now I will rebuild the whole truck and make it a new one (thinking maybe a dual motor conversion)
Good luck!!!!!