i got new rims and wheels off a corvette. The fronts are the right dimensions, but the rear have 19"rims that are 13.5" deep. Can I put these on or will it screw my car up. Also do I need spacers and if so what size?

 

Several problems,
Wrong bolt pattern
Wrong backspace
Need to remeasure width, on beads not widest point.
I think widest any corvette rear was 11" besides z06
And they have a larger backspace between +40 to +80
A 345 tire is still to narrow to fit on a 13.5 rim.

My 285's on 19x10.5 have a 22 offset and with this width if using adjustable camber arms could go in a hair.

 

You got them off a Corvette, did you leave it on blocks? Do the poor guy a favour and take them back as they are no use to you.