I'm sure this subject has been beaten to death, but my question hopefully elicits more specific answers to this age old discussion.

I'm thinking about an 89 model year specifically. I've ruled out the 90 year as being stated as the slowest year. I don't want an M104 due to the increased complexity and higher price of the newer year car, so that leaves the 86-88 and 91-92 cars a question mark in my mind.

The thing that concerns me about the early years is the valve guide issue. Is that not something to worry about once it has been corrected, and is that an issue in '89 models?

Basically, how do the 86-88 models stack up against an 89?

Do 89's have cylinder head and wiring harness issues?

I'm aware they all have evaporator problems, what are other common problems associated with the 86 to 89 year cars?

Thanks in advance!

__________________
63 220S W111
76 300D W115
2013 VW JSW TDI M6

previously-
73 280 SEL 4.5
86 300E 5 speed
2010 VW Jetta TDI M6