I had the '66 Impala SS 396 Turbo Jet 4 speed. The first thing I did was to remove the SS trim, the 396 insignia from the fenders and replaced it with 327 insignia.I attempted to add '65 tail lenses as an urging from my dad, but we found that this was a nightmare as the '65 deck lid failed to align properly with the '66 lenses, but the third outside lens/fender bolted into place easily.. For the few weeks that it had twelve tail lamps,I garnered more than my share off odd looks! I replaced two blue bow tie Chevrolet hubcaps with the red center inserts on the front leaving the rear in blue. I installed the disk brakes from a totaled 68 Impala. I was going for the "I'm piecing it together look" It made an awesome sleeper! Guys in the know could see the extra holes in the fender above the Impala lettering, and quickly figured it out. But, enough about that... I always thought the '67s looked odd with the tail lights the way they were. To me, it ruined the look of the trunk. When the '68s came out with the lenses in the bumper, I felt that it was a much cleaner, less fussy look. Until '67, the Impala always had six tail lenses (yes, I know, the '59s) and returning to three per side gave the car it's distinction apart from the Bel Air and Biscayne. Here in Southern California, four door hard tops have become the rage as all the two door hard tops are taken. I suppose after the supply of four door hard tops dwindle to nothing, the sedans will come into play. I do however, dread the day that comes.