The Derale 26" Dual High-Output, Electric Radiator Fan-and-Shroud Assembly part # D16927 is a universal fit option. We have not had the opportunity to test fit this product on a 1986 Oldsmobile Cutlass Supreme therefore, I cannot confirm whether or not modifications will be needed. The dimensions of this fan assembly are 26" wide x 18" tall x 2-3/4" deep. If you have this space available behind your radiator, then this fan will work for you.
It is also important to note that these fans... view full answer...
The Curt Class II Trailer Hitch Receiver # C12005 referenced in your question is confirmed to fit your 1988 Oldsmobile Cutlass Supreme Classic with RWD. This Class II hitch has a maximum tongue weight of 350 pounds and a maximum trailer weight of 3,500, although I recommend also checking the vehicle's capacities as listed in the owner's manual, as this will most likely be the limiting factor. This is a custom-fit trailer hitch so no drilling will be required during installation. I have... view full answer...