I know Dean still had his 67 Eldo then, so did Frank and Sammy!Frank kept his way into the 80's at the Sands before he went back to Ford from his Thunderbird days.Its definatly the right color...
http://www.ebay.com/itm/Cadillac-Eldorado-Base-Hardtop-2-Door-1970-cadillac-eldorado-base-hardtop-2-door-8-2-l-/271693059746?forcerrptr=true&hash=item3f422b16a2&item=271693059746&pt=US_Cars_Trucks#ht_446wt_900
I'd be willing to bet that Dean Martin Story is a load of BS spun by the salesman to make a sale. Why would Dean Martin order a new car and let it sit in the showroom? Who the hell does that?
Also, how did Gramma get Deano's phone number to beg the car off him? The salesman gave it to her? Ya, right.