Triple groove P/S pump pulley ?

[imiceman44]

In this application the three belts would all be different lengths going around separate accessories with the P/S,ALT, W/P & crank pulleys being common to all belts so equal tension on that pulley wouldn’t be an issue.

As it is though there will still be separate lengths for all belts with just two going around the P/S pulley - one going from crank to ALT to P/S to W/P and the other adds the A/C pulley but bypasses the ALT.
The one I was trying to add was the third belt that only wraps around the crank to ALT to W/P pulleys.

I agree that common length belts wrapped around shared pulleys can be an issue if the belts are not all from the same batch run while being made.
In the end I’ll have two belts going around everything but the air compressor pulley with each belt having different lengths so all should work out well.

2 is fine