I still have my 39 century 4dr, that I bought in 1977. I am the 3rd owner and it's mostly original with a few cosmetic and mechanical improvements. It still has the original upholstery, good enough to be presentable, and original spare tire sidemounts. I changed the brakes to full floating bendix operation, and installed 6v halogen headlight bulbs,also a 41 2 carb intake, which works great, just like a 4 barrell. I purchased it in Utah, but it was originally bought by a lady from the Buick dealer in Oxnard California. I drove it from my buddys house in Springville Ut., straight to Riverside Ca. It developed heating problems on the way and with some pieces of wood wedged at the back of the hood 'to relieve engine heat', man' there was lotta heat coming out. we made it ok tho. Later I made an air dam under the radiator to keep air pressure from building under the hood. The design on 39,s created a 'scoop' below the grille under the radiator, creating pressure behind the radiator thus slowing air flow [I guess?] 39,s dont have enough louvers, anyway it works. The main reason for the heating tho, was a blown headgasket, so I pulled the engine and installed one I had athome.Nowafter all these years I am reinstalling that original engine with a few mods.I had Chet Herbert grind me a cam, and I think its his last Buick strait 8 cam, 'he said it took a half day to reset his camgrinding machine!] he told me 'dont tell anybody where you got it! sorry Chet but its been 30yrs. It had been rebuilt when i first got it, with internal 1952 parts that came from a 39 Buick coupe that reportedly ran at Bonneville in the 50,s??So thats where its at so i better get off this pc and go to the garage and work on it!