Putting S4 staggered rims on '85-'86 S cars?

Hello,

So, the 85/86 cars came w/ 16X7s fronts and back (with a spacer in the rear, yes?) w/ 225/50s all the way around, correct?

Can one update to the S4 (same style) staggered 16X7 front and 16X8 rear w the wider 245/45s on the back? Assume NO spacer needed now?

Any fit issues?

Fit aside, any handling issues?

Better? Worse? Wash?

Thanks.