i found some mustang 17X9s in front and 17X10s in back and i was wondering if there would be any problem putting them on my 1978 280z and the suspension is completely stock and if i did have to do some adjustments what would they be?

the big kicker here is going to be the offset. the stock fender depth of the Zs is not something to write home about. you're definitely going to need flares; but how much is the Q

And are you still running Datsun four lug hubs? If so, Mustangs haven't used the Datsun lug spacing since 1968. If you plan to convert to five lug, you'll be fine there, assuming the Mustang wheels you are looking at are five lug. But if they are the four lug pattern used from '74 through whenever they changed back to five lug, that's a different pattern.

Yes they will fit if you're willing to do the following:

1. Install a coil over kit.

2. Cut the sheetmetal and flare the car front and back.