Here we have the fan assembly installed, after multiple R&R's to sort out all the details. The three visible mounting studs are actually 1/4-20 bolts screwed in from the front of the core support. The factory just used 4 bolts screwed in from the backside of the core support to hold the radiator in, Not an issue, except the bottom bolt holes in the radiator flange are not slotted to allow you to slip the radiator over them upon installation. Would have been almost impossible to mount the fan and radiator if I kept that arraignment. the unseen one uses the factory setup because the front brake junction block is in the way if I try the stud method. I may relocate that when I redo the brake lines.

In any case, the fan mount will be sandwiched between the core support and the radiator.