Small block 727?

Except -
1. I already have a brand new 2800 stall TC sitting in the garage for the 727.
2. There is some question about TC availability for the early 904.
3. I'm not going to put an unchecked trans in behind an updated motor. Both trans' would have to come apart anyway. Not doing it twice if I don't have to.
4. Have to get a new driveshaft made anyway, so it doesn't matter if one is 4" shorter than the other.
These are the reasons I decided to just go with the 727. The fact that it's a little tougher than the 904 is just icing on the cake.
Now for the flex plate issue...oh, and the 8-3/4...and the wheels/tires...
Are you going stock Magnum fuel injection or carbureted?
Mancini racing is selling flex plates for the 5.9 Magnum balance. If you do go with the 727 you can use the factory 5.9 Magnum weighted flex plate and slot one of the torque converter holes. Or you can add the 5.9 Magnum weight to your converter and use the existing 727 flex plate. Lots of ways to handle that.