What rpm stall converter should use?

rumblefish360 said
In order to even make a guess, your missing over half of the important information needed to do so. How about some dang details?!?!

Start with the cam specs.

Your also better off with a 904.

I’m in a bad place without knowing the camshaft specs or the cylinder head valve size? The engine was built by the person I bought the car from.
What makes 904 a better transmission than a 727?