I own a 1974 Jensen Healey and love it and made it reliable but a few points on British Vehicles
1. There are always electrical problems. The issue is not limited to the engine type. My JH runs on 3 fuses and was a nightmare before I had it totally rewired. There is a reason they call Lusa the Lord of Darkness. The only thing Lucas ever made that didnt suck was their vacuum cleaner.
2. There are always mechanical problems. From ill fitting hand assembled pieces to the tradition of a few pints at lunch nothing fits together well.
3. They design cool vehicles though. They have to when comort, reliability and dependability are missing.
That said I love my JH and would not sell it for what it is worth. Maybe for what it cost to get it running though.