Getting ready to do the 727 to 904 swap myself. Like you Dart19666 I've done a ton of 727's but only a couple 904's but since their so similar I think I can muttle through it.
I just want to make sure that I am not shooting my self in the foot here with this Idea of a 727 to 904. As i can see the input shaft is the big problem so I am going to spend the extra 300 bucks and get that. Still looking for a good usable case right now. When I find one I will be on my way. Maddarts Recipe for the 904 I have all that on stand by ready to buy.