I have a 1968 W300 sweptline with 6BT & NV4500 Dana 80 rear dana 60 front with ORD crossover steering Hummer tires & wheels 4:11 gears works nice & I have put around 6000 miles on the truck tuned to pull a trailer with '47 WDX on it. W300 weighs 8400 with me in it. that is a lot for a 4bt if you need any more info just ask RonOk this is my first time posting on this site. I’ve been reading a lot of forums to try to get a better understanding of doing a diesel swap. I’m not ready for the swap yet and this is more of looking for more clarity on what direction would be best to take for what I want to use the truck for. It was an ex military/ fire department truck has 9000 original miles never put on the road since put in private hands. I am wanting it to use on my property and go down the highway as well no huge trailer pulling. A mix of good MPG and highway speeds 60 to 65 is where I’m at. It is all stock. I currently own a Bobbed M35a2 so no stranger to the work that will be involved. I will have the truck home between now and March.