Even though both my Griffens are the same size they are different styles, on the Monte I made brackets that mount to the core support and hold the fans against the radiator using the Intrepid fan mounts.Sweet, would you happen to have any pictures of how you mounted the fan to the radiator?
On my Regal I cut the mounts off the Intrepid fans and made brackets to mount them directly to the radiator and then made a plate to cover all of the bolts.