The vast majority of my life has been spent with either a 2500 (4 of them now) or 3500 (2, looking for another) 400 series Chevy or GMC. Cumulatively, I think I've spent either 14 or 15 years with one in my possession, and the ones that I have driven the most were the 454 ones. Had a single 454 K3500 for just shy of 10 years, and it spent 90% of that time as my daily driver. Even when I was driving nearly 100 miles a day round trip for work. My current K2500 Burb Elise was my daily driver until the injectors crapped out, but I'm working on fixing that, hoping to be done in a month or two. Given the choice of anything else I've ever had, I almost always picked the big, heavy, inefficient old 400 in my possession.