727 Lock up converter choices?

“No one said it’s hard to find”
So you didn’t even search for one?
If you did, you would have come to this conclusion.
Did you even bother calling a converter company and get a estimate price?
After all, your question was slightly assuming that you would pay big bucks and figured you would be better off with a “New Converter.” Let me tell you that converters aren’t cheap unless there a dead stock replacement or not really worth the money spent, AKA - Junk!

High and low stall is dependent on the engine size and its power of it as well as other factors that change the stall rating of a converter.

Let’s take some arbitrary numbers and use some values that will not actually come to for fruition. Just examples.

A 360 converter stalls @ 1200 behind a mondane everyday mill. Behind a small/medium cam & increased compression increase, it moves up to 1700. Behind a HP big block it’s 1800-2000. The way the numbers work going up with more powerful engines also works in reverse with weaker engines.

Adding weight to the vehicle will increase the stall.
Other factors will add or decrease the stall.

Again, these are not accurate numbers.