Your gearbox is the early model. 56-series is the stock Datsun 1200 transmission.so it will mount straight up,if your 1200 is 74 up then you have to build a bracket.

Stock 1200 56a

I have the 56A 4 speed,it only has 1 mounting point.6 inches back.So it looks like I have to build a bracket to span that 6 inches.

used the same auto mount depends what gearbox you have mine had two mounting points i used the rear so i moved the auto mount back one as it has two mounting points.

i then reversed the rubber mounting held on by 4 small nuts. then from the top marked the position and drilled the holes.

I will try upload some pictures.

How did you deal with the trans mount ?

i did a auto to manual swap the only thing you need to do is remove the spacer and some may already have a spigot bearing in the crank if not you have to press one in.

You might need one to hold the flywheel to the crank.

Hay what about the dowel pin I don't have one on my crank ?
Do I put one in or don't?

It's bin really hard to even locate a flywheel ..looks like i'm going to take a trip to the junk yard.I would like to buy a new one but can't find a place that sells them ...any info would be greatly appreciated.

Yah! I finally found the section on that....Thanks.