I'm looking for some information around swapping an IB5+ for a MTX75. In particular:
Drive shafts, what model they were from and were they customised.
Shifter, which one to use and what needs to be modified.
Mounts, I assume they need to be custom built or can an existing mount be modified?
Clutch, can I use the ST150 cover with 23t plate? If so what is the clutch plate from.

 

Before you worry about that lot.

ST150 have a Mazda devired bell housing pattern so not applicable to the Ford type.

 

Correct, as does the MTX75. That's really my problem as only the ST150 has the bellhousing for the Mazda pattern so finding a replacement IB5+ is like looking for a needle in a haystack ( as least in NZ ). Hence looking at converting to MTX75 which are easily obtained and will bolt up to the engine.

 

Why would you want to replace your gearbox?

 

It's done what I'm told is a pretty common problem with the IB5+ and broken the pin that locates the spider gears. This resulted in the spider gears exiting the casing. Finding a used casing in NZ is proving very difficult so I'm looking at other options.