One source....
"A fan shroud should fit the radiator, and there should be some clearance between the two. The shroud should be measured to the radiator to determine the correct size.
At least 1 inch of clearance between the fan shroud and the radiator."
Another source:
https://www.motortrend.com/how-to/bu...-a-fan-shroud/
.
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'70 TA / 505 cid / same engine but revised ( previous best 10.63 at 127.05 )
Old information here:
http://www.hotrod.com/articles/0712p...tiac-trans-am/
Sponsor of the world's fastest Pontiac powered Ford Fairmont (engine)
Best time 5.13 at 140 mph (1/8 mile) , true 10.5 tire, stock type suspension
https://www.youtube.com/watch?v=qDoJnIP3HgE