904 lock-up converter?

I was thinking abouta lock-up in my dusters 904 to tame the 3.91s a little on the highway, will a newer 904/500 lockup work in my 904 cause there is a few companies that make them with the stall I need (2500-2800) but I can't seem to find one just for a plain 904, if any one has a sec and some knowledge about them please let me know, if notIill just keep chugging at 3300 haha