Another champion thread
Got the radiator, and it's 21 1/4" tall with cap. Looks like it should fit by drilling one hole.
Best part is the upper and lower tanks are the same thickness as the rest of the rad- 3" as compared to the original goofy-thick tanks.
This gives the fan another 1/2" of clearance front-to-rear, and was the tightest clearance since I had to move the fan forward to clear the blower belt. Miiiiiiiighty tight that space was.
I thought I was going to have to lose the MP viscous fan, but after this I may be able to keep it.
Old radiator: