Utes had the 4.11:1 ratio, the only way you're goiing to get a 4.625:1 ratio is to import the ring & pinion gear from Japan. I did this with a 4.375:1 ratio (4.4) years ago, & a friend got a 4.6 for her Sunny, both had to be ordered in. I
sold the 4.4 long ago & have lost touch with the lady with the Sunny as well.
A15 powered C20 van's came with a H190 that had either a steel 4.1 or alloy 4.6, they are slightly wider than a 1200 but can go under the back of a coupe with the right offset wheels.