Steering U Joint Questions

Not A body, but my 49 Dodge Pilothouse rat truck. I am looking at this type steering U joint to connect to the original 3/4 round steering shaft and transition to a 3/4 dd shaft. It had two set screws on the dd side and one on the smooth side. I plan on drilling an appropriate corresponding hole in the shaft for the set screw, but this does not seem safe to me. Will that one set screw really hold it together? I really didn't want to have a weld joint for future disassembly, but safety if paramount here. What say some of yall?
Flaming River FR1706DDPL Flaming River Billet-Joint Steering Universal Joints | Summit Racing