440 what am I missing here?

When it comes down to it fun ,and rowdy would be preferred. If I wanna cruise on the highway I have a 74 duster project that will be done soon,and my 55 dodge truck is set up perfect for playing,and cruising. So here it is. The truck was a sponsor vehicle but now that it has done the show curcuit it is on us to do with it what we may. So that said we don't want to tear it down and rebuild it. It does drive,and cruise quite well for where we live. Most of its drive time is back ,and forth to work in town.,and to alot of local shows and tracks usually 50 miles away max. Just really want it to be more responsive when I hit the throttle. Create some adrenaline. It sounds like a higher stall convertor will do that. Is that correct?