how are 3500 stall conveters sopasto act

The original poster sounds like they had/have other issues. So I think using that example is probably not the best idea. Also, torque convertors are like underwear. What works for one person may not work for thier own brother... So saying "my buddy had XXXX" is also pretty much a waste of efort. The only way to make sure your convertor does what it needs to is to work with your convertor company and have one built for your spec. And to that end, you HAVE to KNOW what you're asking for. Dynamic has a "one size fits all" policy for it's "9.5" units. If you so much as mention racing it, they go high on the stall. At least that has been my experience. If you are not very specific.. like "I drive my car around town and drag race a few times a year. I'm not looking for lowest possiblt ET but rather a nice cruiser with a little slip when the throttle is openned". I have sent back two to them to lower the stall speeds because the original owners ordered them saying "I drag race it and I want it to go quick.. and I drive it on the street." After restalling they were much happier with the products. It's because of that that I use Lenny at UCC now. He asks the right questions rather than relying on the customer to relate reality.