You need a good converter that is built to match your combo or it will be miserable to drive on the street. With too tight of a converter, you can have idle issues as in needing excessive idle speed to keep it from loading up and trying to die at a light without putting it in neutral all the time. A properly built converter will not have excessive "slip" in normal driving and will be perfectly streetable. When you jump in it, it will flash and get you into your powerband instantly. Lots of downsides to having too low of a stall, no advantages. Ask me how I know! Find out what you cam is and talk to a reputable converter builder about what you are trying to do and I doubt any of them would recommend a "tight" 10", that probably stalls around 2800. If that cam is a 280@50, I suspect a 3800 stall would be on the low side with a heavy car, but I am certainly no expert.