Engine had been repaired 2-3 times before me. Ex Russian/Soviet block embassy car (no fancy stuff).
- repair of the engine.
- later on front end of the exhaust pipe
- mechanical voltage regulator "worn out"
-front lights (long) changed to western version.
-repair to some of the bearings in gear box.
After the major job was done (engine) it run very reliably. Gear box had only 4 gears, so fuel was spend more (8,4-9,8 l/100 km).
Fast starter, easy to burn rubber, uncomfortable on long tracks, nice fake leather benches. Black beast ;).
Windows got frozen on very cold weathers, but main window was always open.
It was like driving a limousine or something - all eyes looked at it. Maybe because it was black, looked like rat car and had REAL iron/chrome front.
Actually, there was no Lada 2105 in 1974. Because VAZ started to build 2105 from 1980. Probably your car was Lada 2103.