Subframe connectors for a driver/cruiser, necessary to weld to floor?

Unless you have slicks and are racing you don't need subframe connectors. It's only the force of power against traction that generates the need for connectors to reduce body twist. If you dont have north of 450 hp and slicks/traction save your money.
Wrongo. If you set the car up with bigger sway bars, wider stickier rubber, and poly bushings, it will most certainly benefit from subframe connectors keeping the body stiff and forcing that upgraded suspension to do its job. Not everything about these cars involves just a straight line.