Jeff, I just talked to my brother and he said that they have a mid 90s bus if you need any reference photos. He said that he thought it had a DT360 in it, but he would have to check.
He said that different states have different specs. He said that his experience in North Carolina has been; DT 360 in 93 models, DT 408 or possibly DT466 in 94-95 models, DT 466 in 96 models and DT 466E in 97 and newer. He said that he doesn’t remember seeing a T444E in anything older than a 2002 model. He also said that 24 valve Cummins were available in 2002-2003 models. This is all going off of memory so there is the possibility of being a year or so off. Also other options may have been available in your area.