Fresh 904 start-up

Just getting my 5.9 Magnum swap installed into my 68 Valiant and trying to figure out what I need to do with my fresh built 904. I prefilled the converter (stock) with a good amount (honestly don't remember how much but I believe it was over a quart) and installed it all.
Like I said this is a fully rebuilt transmission, so I expected to need 8+qts to fill it up. I got about 7 into it and it was full up into the dipstick tube. (This is all before firing the engine at all)
I left that 7ish qt in it and fired the engine in neutral, somewhere in this forum I read that the trans pump runs while it's in neutral so I figured it was a good bet. I still have fluid up the dipstick a long ways after running the engine for over 15 minutes.
I'm nervous to put the trans in gear because I don't want to starve it if fluid and cause a problem, but I would guess that it needs to be run through the gears to get the fluid throughout the trans.
Am I missing any steps or is the next step to put the car on jack stands, run it through the gears and keep the fluid full?