W code for a 3.25 please?

Let the record show that I answered a technical question for Don. Disregard the fact that it isn't my answer and Don is traveling.

pmansson said:
w=0,68 is for a car with a 3.25 diff

and a speedometer in Km/h.
w=0.69 is the same but for slightly different tyres. The early coupes had 175 tyres, which was replaced by 185s around 1972 or so.
I use 205 tyres (with 70 profile as in the above examples) and remain with that speedo, with very little noticeable difference on the speedo.
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