It would be simple for you to run manual, Im pretty sure youd need the fmj plate that lets you use the 2 stud master and its for manual because its arm is leveraged a bit different.

I run my master (and im pretty sure its the 15/16? Cass sold at the time) I can dig out my paperwork and it runs through the oem per-portioning valve.

I still have the WW adjusteable valve in its box I thought id need.

Ive never had one instance where I said to myself "I wish they were power" and ive been on them hard at 140.