Mopar Camping Trip w/ pics

I've thought if I ever had another one, I'd like to put a Cummins 4BT with an Allison automatic. A 6BT is too long to fit in a Class C. The Gear Vendor was in ours when we bought it. I don't know if it would help mileage much unless you were on a long run of interstate. I tried the gear splitting, but it wasn't worth the trouble. I think ours had either 4.56 or 4.88 gears in it. It was a big Class C to be that old. It was 24' long.