You need to call Frank Lupo's Dynamic converters.

http://dynamicconverters.com/news.htm


They will hook you up with what you need. I have a 500 Stroker, 727, Gear vendors with 3:55 rear. I have driven it over 50K miles in 8 years. In 2008 I switched from a Mopar Performance 175K to a custom converter from Dynamic. The difference was night and day. MPG increased by 2. The car idled and took off way better than before. The converter flashes to 3800 when I need it to. No slippage on the highway when cruising at 75 MPH at 2500 RPM. No slippage from a dead stop either. Cruising at 35 mph in OD, punch it, converter flashes to 3800, my 4200 pound car takes off while whipping my passenger's neck back into the seat.

The original 509 can be driven on the street. I got 35K miles and over 100 1/4 mile runs on mine with the GV in the car before it wiped a lobe. Went with a little milder cam on the rebuild.