I have a 1996 E-SuperDuty bus that I am changing from a 460 gas engine to a Cummins diesel engine. The bus has the large 55 gallon tank. I swapped a diesel tank module without the fuel pump in place of the original tank module. The tank was very clean inside with no flaking or damage to the black colored internal coating but all it has had is gasoline in it to this point. I have read about all of the problems with 1999 and later diesel fuel tanks. Should I be worried about the 1996 tank?