Need help with converter

I'm not seeing a question here? Are you asking if this this is good convertor for your application the answers are maybe it will be optimal and yes, you will enjoy the car much more.

If they told you it would stall at 300-3500 behind your combo it's pretty obvious you didn't give them dyno specs. They can narrow it down almost exactly if you give them all of the info on the order form.

That being said a convertor should be sized to stall 500RPM over the engines peak torque RPM. This isn't always the optimal number for the street though. Other factors such as chassis etc also play a roll in convertor selection.

PTC is a great company and I've run their convertors with great success. You'll enjoy this new convertor greatly. Is it optimal to your combo, can't say.