Oh yes
, I've had minis, 1100's, a Morris1300, an Imp, an MGB and a couple of Mk III Cortinas and fixed 'em no problem until I got an XR3i
Have had engine management box problems on an 02 BMW 320 and an 04 Saab 9-3. The BMW introduced me to "can only be diagnosed by a main dealer" prices of £120/hr in 2008 and a few hundred quid for a new electronic box (couldn't get a spurious one). I'd be heartily upset if I was at 2,000 ft when the engine decided to go into "limp home" mode.