Which Shroud

[Litdave]

I have installed a serpentine belt setup on the front of my motor in my 69. My original fan shroud was busted in several pieces but it looks like it is too small of a diamter to clear my serpentine fan.

I am looking for another shroud but am unsure as to which one I should get.

What is the difference between one with AC and w/o AC? My truck has AC.

Also what is the difference between a small block and big block shroud?

I am new on this board, which by the way is awesome, and would appreciate any and all info.

Thanks