you can find a smaller diam. blade for the clutch. they have 16/17/18 ect...

I happen to find the size i needed at the u-pull on a striaght 6 amc hornet 7 blades and fit the inside the stock rad shroud on my truck.

if the rubber motor mounts flex much it might get a water leak.

measure the diam. of the fan blade end to blade end,I will check to see if I have a smaller one in my junk pile.

how close is the clutch from the rad core?

are you going to run a shroud?

you can find shorter longer fan clutch shafts as well when uprading.

looks like it is moving along bolting together.