Get the cool looking Eldo. 1970 or older, plus you have the 500 or 472-- depending on the year.
I bought a '69 Fleetwood about 5 yrs ago, kept it for 2. Sold it with 45k miles, put on a few thousand w/o a hitch.
Bought it sight unseen from an older gent in Pittsburgh. Drove it back to Wisconsin and only stopped for gas. Great interstate cruiser.
Watch out for the usual suspect, rust! Otherwise they're straight fwd. Most of them need front end work due to the huge lump.