First in the 12v the pump holds about 2qts oil and takes several hours to drain out of the pump. So let it sit for a while or many let it sit over night. Makes sure you get all the oil.
Add one 1qt to the filter and 10 in the filler tube. Then fire it up and adjust from there.
Also since the pump does hold 2 qts, and the min-max marks on the dipstick are about 2 qts. So if you just stop the engine, wait a few minutes and test you should be on the low end of the scale. After letting it sit for 2 hours you should be on the top end of the scale.
Not letting the pump drain and dumping in 11qts and/or filling to the max mark on a freshly run engine is a good way to over fill. Then oil come out the breather tube and dumps all over the front diff, stinks for about a week, etc.