727 or lock up 904

So you have the a500 overdrive trans or a 904 with lock up converter? If its a 91 a500 overdrive trans it also has lockup converter as well. I wouldn't be afraid to run the that behind a 340, going to need some fab work on tunnel and trans mount but the overdrive would be nice. Not sure if there is rmvb for the od trans.
Just a 904 w/lock up converter. Not o/d.