Same parts and injection hardware for both years, GM did not change much until 1980 when the newer smaller version came out (with that ugly lump of a trunk).
That is actually an Oldsmobile engine in both. Cadillac did not have a "small" engine for the car so they simply "borrowed" from the sister company and dressed it as theirs.
1977 to 1979 also have disc brakes and better ride than the 1975/1976 versions.
You have a big job ahead of you, good luck.
Nice cars, wish they still looked that good in my area, around here those would be scrap by now.
Your English is better than many of the people I talk to daily, and they were born speaking "english".
Tuesday, January 3rd, 2017 AT 7:43 PM