That is a 3-wire motor, so you will need 3 wires+ground between the control box and the pump.Motor No 79453104
If you wanted to make a flow inducer, you would probably use solvent weld D2729 sewer pipe: OD 4.215 ID 4.056
You would want construction which did not have worm gear clamps over the body of the pump assembly, because that would increase the diameter. https://terrylove.com/forums/index.php?threads/idea-for-flow-inducer-construction.86907/ proposes a construction where the clamp pinches the pipe above the pump to not increase the overall OD.