Right length power steering belt

[trailblazr81]

I replaced the motor in my 73 K20. It has power steering and No A/C. It has a 2 groove crank pulley with a belt for the alternator and a belt for the PS pump. I replaced the motor and it has a 3 groove crank pulley. I bought new belts, the alternator belt went on with no problems but my power steering belt is too short. I cant even pry it on with a screwdriver. Does anyone know what belt I need or at least how to properlly measure for one?? I dont want to have to do a lot of dissassembly and have to change pulley's. Thanks!!

 

[pvfjr]

Use a string to wrap around the pulleys to mock it up, then take that to the auto parts store. Just make sure you give yourself a little leeway in each direction for adjustment and measurement error.