Hello, been a member for years, read and studied many posts, and have enjoyed the many talented people and their builds/discussions. A little background, my first conversion was a 4bt w/turbo 400 from a ex-Frito-Lay P30 van into a 1980.5 chevy C30 454 w/turbo 475 crew cab dually. This was in mid 90's. The only real improvement was fuel mileage. I then started looking for a 518 transmission from behind a 1st gen dodge. The local wrecking yard had one that needed rebuilt in a 93 d250 standard cab for around $500 or I could buy the whole pickup for $1500, so I bought the whole thing. I rebuilt the tranny in the dodge and drove it for a while. It was so much better than the 4bt. I decided to swap the 5.9 and rebuilt tranny into the dually. I finally found a 47RH and rebuilt it so I could have a lock-up TC. I thought it would be a simple trans swap in the dually, but no, I tried to use the 2nd gen thicker adapter plate but the starter wouldn't fit due to the narrower frame of the chevy, so back to thinner 1st gen adapter plate. I was able to make a spacer to use the 47RH on the thinner plate. I ran that setup in the dually for years. During this timeline I also did a partial rebuild on a 1952 John Deere model R tractor that I would tow with a 20' gooseneck to different EDGTA shows in my area. The 4bt would sure work hard and egt's were high all the time(no after or inter-cooler then). The 5.9 made a big difference. I started to research what kinds of auto-transmissions were available to swap into the dually, from allisons 545, 1545 (lock up version of 545), this was before the 1000's came out, 68re's aisin's, etc. I finally decided to go with a manual transmission swap so I found a RT6610 on eebay. My daily driver was a another 93 d250 club cab that I hit a deer with going to work one morning. I needed a pickup to tide me over ( as the dually was not usable because I had to use the 47RH in the 93 clubcab) so I found a 127k 97 ram 2500 club cab w/NV4500 locally that I currently use. I really like the way it drives and handles. I decided to use the RT6610 in the 97 ram2500 instead of the dually. So I will post more of why I decided this way and some pictures when I figure out how to do so.