During my contact with custom axles companies, I was informed to contact Checkered Flag Racing and appears they have stub axles and CV adapter wheel hub flanges (I think these were originally from Modern Motorsports). I presume it means it is possible to use the modified Datsun/Nissan CV axles with 27T splines.
http://www.chequeredflagracing.net/Datsun.html
STI diff
Re: STI diff
1972 4dr KA24E-T
1972 Blue WaGoon
1972 Blue WaGoon