Beater,
That old D40 sounds like it was a cool truck. I picked the 53 GMC because I loved the look of it. My efforts to update the drive train and brakes was just because finding the parts for these older heavy duty trucks is a real problem. Especially brake parts. There are a fair number of companies supplying brake parts for the 1/2-Ton to 1-Ton trucks, but anything bigger than that is left to dumb luck finding anything. I will start to look closer at the turbo idea.
CNC,
No problems on my end. My truck is rated to 16,000 lbs GVW, 26,000 lbs combined. Any modifications made, including brakes are from a similar class 5 vehicle. The tires this truck uses are 9R-22.5. This thing is bigger than a 1-Ton that's for sure.
