I'm looking for some good slice of life manga that has a late 70's/80's art style. Something kind of like Kimagure Orange Road or Touch for example. Does anyone have any suggestions? Thanks, any help is greatly appreciated. 🙂

Banana Fish is set in 1980s New York and does capture the lifestyle of the street gangs at the time. I wouldn't call it slice-of-life as it has a really complex, but awesome plot. Still there are moments of just pure comedy and a definite sense of realism despite the elaborate plotline. I highly recommend it.

Sanctuary - This is early 90s I think, so maybe isn't to your taste, but does have a lot of old-fashioned themes. Especially concerning the role of women, this really isn't one for a feminist. The plot line is, again, elaborate, but realistic (mostly, some points are highly exagerated to move the plot along) and touching.

Kawa Yori mo Nagaku Yuruyaka ni - set in Japan in the early 80s, in a town near to an American military base. This looks at some dark themes, like prostitution, but is very entertaining. It's more a boys-will-be-boys style than searching for deeper meaning. It's very slice-of-life to the extent that it really has no plot.

That's all I can think of. I know you said 70s/80s style rather than set in that time, but I thought that manga from that time would have the right style so just picked the few I know that might fit. Hope it helps.

The pen is mightier than the sword...and considerably easier to write with.

Maison Ikkoku i think its the perfetct fit.

Family: shoujo, it's about an American family's every day life, how they relate and support each other. It's funny, but sometimes touching too.

I just read Munou no Hito, I think it's quite good.

Aruku Hito, it's from 1990, but I think the style fits.

Master Keaton and Yawara, I haven't read them yet, but they're earlier works by Urasawa Naoki, I think it's worth a shot.