In the more than two years that I have owned my 73 3500s I have often wondered about the compression ratio. The body number prefix stamped on the inner wing is 482. I have looked carefully for the engine number which should be either on the LH cylinder bank near the oil filler or at the rear. despite a carefull search, I cannot find the engine no. or compression ratio. The original certificate of registration in NZ describes the engine as 485. I have referred to Rudiger's helpfull website and I find that the prefix 485 is " V8 manual/ em control 10:1 compression ratio". The 482 body no. is described as "Export RHD". Does this mean that the CR is 10.5:1 ? I doubt that the petrol in NZ at the time would handle it although I had an Australian Holden that had a 9.25:1 CR. Advice sought.