727 vs 904?

I got into a really huge argument over this on a facebook post a while back.

Yes A727's is stronger but heavier with more parasitic loss. But the gap between 727 vs. 904 has been narrower nowadays. The A904 can be easily built to be quite strong.
A904 (or A998/999) have less parasitic loss and some are equipped with wide ratio gear sets.
With A727 you're stuck with the 2.45-1.45-1 gear set.
A904 series came with the 2.45-1.45-1 or 2.74-1.54-1 gear sets.

I just did a non-lockup conversion on my A999 this last summer.
I was just surprised how simple these torqueflites are to work on, even a knuckle-dragger like myself can do it.

http://www.hemmings.com/hmn/stories/2014/01/01/hmn_feature26.html