MP15AC's trucks?

Only a die hard diesel fan could tell with the exposed bearings. Many O guage MP15 models use the F unit trucks anyway and there have been no complaints of it's use on a modern loco so go ahead!

The MP15AC model was designed and built with the "modern era" Blomburg, or "GP" design two axle trucks, which were/are the same as what came with, say GP40-2 models. The same applies to the MP15T. 

The only difference in the journal boxes, shown in the linked photo above of the CSX unit, is the difference between the "original equipment" Hyatt oil filled roller bearing boxes, and the Timken cartridge "rotating end cap" roller bearing.

 Thank you!