According to my research, your 1996 Caddy Fleetwood has the GM 5.7L engine. The radiator adapter fitting you mentioned, part # D13018 would indeed be compatible with your vehicle, and could be used to replace the cracked fitting you mention.
Since the transmission line running into the radiator is a hard line, you will need to install a short length of 11/32 I.D. hose like # D13003 between the two fittings. You will also need some hose clamps, like those provided with # D13008 to secure... view full answer...
While a custom fit hitch for your 1996 Cadillac Fleetwood Hearse is not an option, the Multi-Fit Trailer Hitch # 5350 may work for you.
The hitch is adjustable to fit vehicle frames from 24 to 46 inches wide, has a capacity of 5,000 lbs and features the 2 inch receiver you wanted. It requires no welding and all hardware to install it is included.
Since your frame is recessed a good 16 inches behind the vehicle's fascia, your best option is to go with an extra long ball mount like # EA40... view full answer...
I have a solution for you but a custom fit hitch for your 1996 Cadillac Fleetwood Hearse is not an option. The Curt Adjustable Trailer Hitch Receiver item # C13701 is a class III hitch that is adjustable to fit vehicle frames from 18 to 51 inches wide. It has a capacity of 5,000 lbs and has a 2 inch receiver. It requires no welding and all hardware to install is included. view full answer...