The 478 v-6 is within 25 lbs of the 6BT cummins. The cadillac 500 was a choice of mine several years ago and it actually weighs between 50-75 lbs more than a chevy small block because of it's high-nickel content. I chose the GMC engine because(on paper) it had the same characteristics of a 6BT cummins as far a low-end peak torque. I have towed with this engine and it's an awesome diesel! I am looking at the V-6 because the Cummins is turning into a "small-block Chevy-like" cure for a power plant and I wanted something different. I also want to build this truck to look like something that GMC would've manufactured in 1966. I sometimes feel like I was born in the wrong time period(I was born in 1977,lol).
