Van power steering bracket issues

I'm running stock a/c bracket with no a/c and power steering. I want to remove power steering pump/pulley. My understanding is I have to run a 7 rib ideler that's smaller than my stock one to get belt to be good tention? And what belt was that again?

My current set up in pics with stock a/c bracket, and p/s. I just cut the a/c side of bracket off. (Not shown in pic)

View attachment 1715630888

View attachment 1715630889

for that setup i would just locate an AC delete pully and run a stock idler