Overdrive transmission

That's why I asked about length of the GM trans. If it's shorter overall that would make up for the length difference between the GM and the Mopar trans.
I thought the 200 series GM trans was the weak noodle one that couldn't take much power, thought you had to get into the 700 series or a 4L series to get some beef
I believe I've seen 2004R's with a 1000 hp rating. I think you just have to put the good stuff inside. Extreme Automatics 2004R complete units and performance parts.