Im a Fuc#ing Thickhead!!

I started my new 408 on the engine test stand. Sounds Sweet!!. Now heres the dumb part
My brother and I built the 727 3 months ago and for some reason I thought I had filled it with tranny fluid back then . Well you idiot you didnt, and I started the engine idled it up checked the timing etc without thinking about the auto.

Started to make a noise from trans and turned it off straight away. Pulled the plug and it was bone dry. It only had the oil I had put in the convertor before installing that.

You cant believe the self loathing I am feeling right now.