the 3.9 is in it now and was a good ratio for eastern creek
I was about 1.5 sec quicker but the gearing felt right and it pulled much better in 3rd
I am going to wakefield in june and will try the 3.9 there last time I had a 3.77
I am not sure what the other box is but the gearstick is in the same place. I think the splines are different not sure ? it is down the shed I will look at it one day soon
I bought it off someone on this forum I cant remember who
it has a 2.92 first gear? I think it is from an old cortina or capri maybe??
mal