Bud,
Following our telephone conversation today, I should perhaps expand on what I explained to you.
I am after a final drive ratio of 3.44, because my present one of 3.89 is too low.
When I came to check the UN1-08's crown wheel and pinion, I found it was 3.778, which is still too close to my existing Renault 25 ratio.
My very sincere apologies for messing you about and I hope you are still able to sell it through the forum.