(rear) 17x9.5 (5.5" backspace custom) 5x4.75 pattern
(front) 17x8 (4.75" backspace 505-7863) 5x4.75 pattern
These will fit a 69 Camaro. As for Tires, I would recommend a 45 in the rear to fill a little better, many run this combination and are very happy with it:
Kumho ECSTA 711 (High Performance Summer) 320AA
235/45HR17 - $76 at Tirerack
255/45HR17 - $80 at Tirerack
Comes to $352 shipped
You can go 275/40R17 in rear if you really want to push it but will most likely need the rear quarter lips rolled.