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Lot of confusion here I'll add some more
The Allison 540 series of which the 545 is one can be found on gas engines by GM,Internationaland maybe Ford. The 600 series are better but not that common on school busses.
The DT466 is an International(navistar)six cylinder diesel related to the DT360. International also made the 7.3(444) and 6.9(420) The 8.2(500) is a four cycle Detroit Diesel. The 427 BB Chevy was an optional engine and as stated is very similar in size to the 366 BB.
If interior hieght is a concern check out some of the "high roof" Thomas school busses.
Rickster |