73 could be Hatchback, but the reason I bought this one back then was because it wasn't. I had plenty of them!
The gears should be:
700r4 1st: 3.06, 2nd: 1.62, 3rd: 1.00, 4th: 0.70 and reverse at 2.29
Tire size is unknown right now. 295/50/15 for the look, but I have some Nitto 555R's in 275/60/15 I wouldn't mind fitting on it.
I have been busy all Christmas season on this so the whole assembly is a present to me. I want to have it running just after the New Year.