First truck I drove was a White 4000, had a 250 Cummins and 10 speed, Reyco suspension. I hauled loads to the grocery store chain Grand Union. Those were eventually replaced with the White Road Boss that had the 290 and 10 speed, I remember the turbo on that engine was pretty loud with the whistle, music to my ears! They switched to Ford L9000 next for quite a number of years, 300 Cummins and 10 speed, Hendrickson suspension.