77 Fan shroud help!

[billyjack]

In the middle of installing the 383 in the pickup, and the old fan shroud is broken.  No problem, I'll just order a new one.
Except that the only shrouds available for the 76 and 77 show that they're for "no a/c".  Well, I have A/C, and always have...

Does it matter?  Should I order a 76-77 without A/C and not worry about it?  Is there a reason it won't work?  Bolt holes in the wrong place?  Is the shroud too small/narrow/short?
Can I order the 78-80 shroud for A/C? 

Why does 76-77 have so many oddball parts!?


Thanks guys!