If the long bed tank is the 16 gallon version then yes. If it is the 20 gallon version, no it is too long. You can measure the tank to see which one it is.
16 gallon = 14 x 42 1/4 x 11
20 gallon = 14 x 56 x 11
My long bed has dual 16 gallon tanks so you could steal mine...... but don't.