which tranny 727 or a904

I raced a /6 for years, even though I'm only 28 lol...
904 without question. If you want a healthy 904, replace the innards with V8 904 guts.
The 727's came in few cars and some trucks, they simply suck up to much power.

The last /6 727 I had in a truck and the fellow drove a few hours to get it!!