Torque Converter High Stall = Loose?

The converter technology has improved the
last couple decades.

However, that being said 3000/3500 is the limit what
we run in our weekend street cars.

I have about 20 High stall converters that we have tested
sitting in the shop that we have tested. With anything above
a stock 10 3/4 stall converter, I recommend a good transmission
cooler before you drive more than a few blocks. We have rebuilt a
number of them ourselves (My friend has a converter shop) and heat
has been the biggest issue with trans and converter breakdown in
street cars.