I guess I should know this as it was/is my car. R5593. Originally delivered to Leepers Studebaker. Gray, black interior, automatic, 4.09 axle, tilt wheel and am/fm as delivered. The am/fm not on the PO. However the car had 700 miles on it when delivered so probably was used in SB for awhile and had the radio installed by some executive(?) who was using it? Maybe.
The engine was removed by Leeper so his wife could have air conditioning installed. He installed a standard 289 with an ac unit. When I bought it Leeper no longer had the R3 engine. He had sold it to his mechanic. I was told it was in a Stude truck and the mechanic had moved to the Phoenix area. I later found out that Ed Reynolds bought the engine and put it in a black 64 convertible. Roy Heckers bought the convertible and he sold it to a fellow in Knoxville, Tenn. I kept in contact with the fellow in Tennessee and after twenty or thirty years I was able to buy the car with engine. Now the original engine is mated to its original car. At least it’s on an engine stand next to it.