I've had a bunch of different converters over the years of racing and helping other racers, BUY a good one, DON'T SKIMP
I had Continental build me a custom 10 inch street and strip for my Duster off of a dyno sheet, it went fast but it didn't have much foot stall RPM,2300 RPM or under only
I hopped the motor up quite a bit, went from running mid to high tens to low tens and ended up destroying that converter
I had a new T/A 8 inch SS/AH converter as well as a new T/A 069J nine inch SS/AH converter, I had tested the nine inch before breaking the ten inch but I ended up breaking the rear end when the nine inch was in the car so I sent it back to Paul at T/A to have it check out. I put the 8 inch T/A in my car and it picked it up .2 ET and almost 3 MPH in the 1/8 mile compared to the 10 inch
The T/A 8 inch will foot stall above 3500 RPM and the old ten inch would slide the skinny front tires through the staging beams at or above 2300 RPM
IHTHs
More info on your intended use and parts combination might help us give you more information, converters are a lot like women, there are good ones and there are terrible ones and there are others in between
Paul Rossi told me years ago at Orange County one night when he was testing converters that converters are like women, once you get a good one, hold onto it and treat it real good
Works for me
47 years with my wife and a bunch of different converters, some went with cars I sold, some I destroyed and some got sold, technology changes so stay with the times