I have the same question... my cast number is the exact same. Not sure of year but im told it came from a motor home. Do they have a different cam? And id like to figure out the year too.
Theres a guy i have to contact who makes rads for the dart 22" i believe. I just have to find the other thread again and contact him. He has an ebay store. I could be wrong but i think its champion.
I got the basics like mounts and such. It was more what harnesses people are using, headers, i can find parts.. im just not sure if its the right ones. But thanks.