I just had to redo some calculations and lookiing up of parts. I think I mislead you sorry.
If you have a 4.3:1 diff, the speedo ratio you want is 22:6 or 19:5.
22:6 is probably the common one, and easier to get. 19:5 is better for smaller diameter tyres like 185/60/14 and was used in Europe with those tyres and on GTV.
