rests (1966). New for the 1963 model year were independent rear suspension and optional electronic ignition , the breakerless magnetic pulse-triggered Delcotronic, first offered by Pontiac on some 1963 models. [5] All 1963 and 1964 cars had 327cid engines, which made 250 hp (186 kW) standard, with optional variants that made 300 hp (224 kW),