from the top of the front core support to the top of the radiator cap

'67 Barracuda which should have almost the same body dimensions, give or take production tolerances...

Test Fit #1. ZERO Clearance to hood.
upload_2020-1-11_15-4-36.png

As checked by gently closing hood on crumpled aluminum foil.
upload_2020-1-11_15-6-12.png

Test Fit #2, Good fit - same '68-'69 radiator with '70 bottom tank and slightly shorter core.
5/8 to 3/4" hood clearance.
upload_2020-1-11_15-11-15.png

upload_2020-1-11_15-11-51.png


#3 Hood clearance with square top (70 up) radiator (with radiator shifted forward to provide more fan clearance).
upload_2020-1-11_15-17-42.png

upload_2020-1-11_15-18-5.png

and yes I have, or rather had, a dog. LOL.