Conway,
I'm not an expert on Rear Axel Codes, but I believe we can safely say the "C15" designates a 15,000 Rear Axel.
By the way, with a 19,500 GVW, the 292 would be plenty good enough. The Brownie will only make it better.
You won't be the fastest from a stop, but you should be well satisfied with the performance. If you do put one in, don't forget to super tune it and let it breathe.
Bill
