Howard, your experience of all classic cars being rust heaps is I think based on old evidence. Today a car under say 10 yrs old is far more likely to be rusty than one 40 yrs old as by now most of them have gone through thorough restorations. The TR6 I owned a couple of years ago was totally rust free having been well restored (and proved totally reliable during its time with me). My current classic AH is also rust free on a new chassis and will I am sure, even if I do nothing see me out before it needs work.
I wouldn’t exclude a classic from your thinking, and it would certainly help avoid all that electronic gizmos, although your choices would be limited if you are after that much ooomph!