Want to trade?

I have a 489 case, 3.23 suregrip, 49K miles, no noise, worked great, big yoke. Never been apart, I cleaned it and put it in my Dart. Now, I'm going in a different direction, and a lot more horsepower, so I'm looking for either a 489 case with a clutch type sure grip, or a 742 case suregrip, with either 4.10/4.11 or 4.30 gears. The center section is located in East Palestine OHIO 44413. I really don't want to sell mine until I have another lined up. Tell me what you have, and what you want for it! Thanks!