I can check some of the info for you. I have MR30 Skyline, C110 Skyline (240K) twin spots, 240Z, and Stanza struts and brakes in the shed. And my road car is an R31 Skyline so I can check them too. But I'm racing this weekend in the QLD Super Sprint Series Final, then Noosa Historic Hillclimb the following weekend (hopefully - haven't got confirmation that my entry was accepted yet). So between racing and preparation work on the car, it will be a couple of weeks before I really have time to dig these struts out and compare them.

I noticed in a topic a bit further back someone said 240/260Z struts will fit on the Stanza lower control arm/balljoint. This is NOT true. The bolt spacing at the bottom of the Z strut (where it attached to the steering arm) is wider apart than every other common Datsun strut that we are talking about here. You will need to get either the steering arm or steering arm and balljoint or complete lower control arm. I have not confirmed which of these options is best yet, I have to go and have a closer look at what exactly is the best way to go, then buy the peices so I can use my 260Z struts and brakes. Safest bet is to buy the complete strut, brake, and lower control arm assembly and you can be sure you have everything you'll need to complete the conversion.