Do you mean the look of prints of the 70's and 80's as they look today, or as they looked from publications that printed them back in the 70's and 80's? If you are looking for the aged print experience, i'm not so sure.

I get a funky old look by using parts form a can of 100' of frozen but long past best before date Ektachome 5012 and dev in e-6 for 6 minutes FD, rather than 7. It gives a dark but low contrast result. Then make an interneg on copy film and expose to lighten the dark original and print on modern paper.