You might get up to 1720cc if you can bore out to 78mm... but you'll have paper thin cylinder walls, and you probably can't go that high anyway.
Bore / stroke (D16Z6) / displacement:
75mm / 90mm / 1590cc
75.5mm / 90mm / 1612c
76mm / 90mm / 1633cc
77mm / 90mm / 1676cc
78mm / 90mm / 1720cc
79mm / 90mm / 1765cc
80mm / 90mm / 1810cc
I guess you could do it, but I doubt you'd be able to get to the higher bores...