Tranny Recommendations for 600 HP

I am going out on a limb, and may be wrong, but in the top right of the tranny pan it looks as though the hole for the dipstick is on a kicked out portion on the pan. IIRC one tranny has the kickout (I cant remember which) and one doesnt.

Also, I think he ought to build the tranny he already has and use the correct converter with correct governor weights and kickdown. Let it shift on its own. Slam a nice shift kit, decent clutch and bands, new bushings, bolt in sprag, correct kickdown lever and correct kickdown setup and that 727 will bang with the best.

It has always amazed me how many people dump the shifting on its own instead of putting all the good parts (mostly factory, like the correct kickdown and gov. weights) in either tranny and seeing the full potential of the torqueflite.