Hello good people! Im looking to swap a 4bt or 6bt in a 1977 Dodge Sportsman, class c RV, depending which would be simplest, cheaper and fuel efficient; give or take. Its a 22ft RV, weighs around 10k lbs. It has a 360, duelly and not sure what trans. Im leaning to the 4bt due to space, hoping it'll drop right in. I have no idea if i can use the same trans or what to swap. Main objective is to gain Mileage. Im aware the cost would not lead to savings, and would eventually want to go to biodiesel. If anyone has experience swapping a cummins into 70s dodge, please help me out. Thank you for reading this post.
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