Which Pulley Set Up?

All,

I have a 73 Dart with a 360 and am swapping an engine in it. My crank pulley on the current engine was a 4 pulley type because the car had a/c, but no longer. The pulley had a bad wobble in it so I' looking for another.

Many of the 3 groove pulleys that I have looked at are smaller in diameter than the one on my old engine. Mine measures around 7" in dia and is 5" tall. Almost every one whether billet or used are smaller in diameter.

Is this the correct size? I'm sure the diameter will effect the speed of the water and steering pump and alt.

Should I use a 2 groove since I have p/s.

Can anyone recommend a set up for my car?

Thanks,

Marion