I have a 73 Z28 without A/C, that needs a new fan shroud, but I can't identify whether I have a HD rad or a standard rad, and it makes a difference for the shroud, any suggestions?

My first 73 had a standard rad. and the new one has a HD rad
The difference is a lot
It's the length that is different
IIRC the standard is 26" and the HD is 31",the standard is offset to the pass. side
I think the Z would come with an HD

My core is 26 in. but my whole rad is almost 32 and it looks to be centered, do you still think it is a HD?

I now find that it is a HD, everyone I talk to thinks all Z's were HD, and you can still get fan shrouds from GM, just a little expensive-$150.