I think that 69 was the last year for body color wheels. All three of my 70 Darts came with semi-gloss black wheels with full wheel covers, including the one my Dad bought new, and an 'old lady car I got with 27,000 original miles.
Even on pre 69, if you had full wheel covers the wheels were semi-gloss black
The question is with dog dish caps, through at least 69 if you had dog-dish caps (poverty caps) the wheels were body color.
some time later this changed, what year specifically I don't know.
