Fan shroud diagnosis/help

[Davidf]

1971, 350cid, automatic with a/c. Generally, engine temps are fine except during periods of idling in traffic with a/c on and air temp 90 degree plus. Temps come down immediately upon moving. no boil over, but temp guage climbs to read zone, radiator outlet temp too high (200+). The fan shroud is the obvious issue (gap), I need a new shroud due to the current one being cracked broken in many places. But, the fitment of the shroud is the issue.

I assume shroud should be tight to radiator so air doesn't get sucked into the gap (low pressure zone) instead of being pulled through the radiator. Help on what parts I need to order would be appreciated. I assume I would start with a a/c shroud from LMC (currently on sale for $50).

Here are some photos:
First is top right, showing gap. Radiator side tank fills bracket channel.


Second is top left. Radiator side tank does not fill bracket (shorter than right side), brackets are both same (right and left side).


Finally, bottom gap. Clips hold bottom off radiator with equal gap of 3/4" or so consistently around shroud.