What OD trans to hold 700 ft lbs?

transgo makes a valve body kit for the 518 to turn it into a full manual, think the part# is tfod-3. you will not need the kick down linkage if you use it. from what i have seen the only draw back of a 518, at least right now, is the choice of valve bodies is somewhat limited. i do remember looking at the smr website and it saying that pretty much any valve body available for a 727 is also available for a 518.