First clarification. My B model has no nodal mount. I don't think R models had it either so it is a later model change. Mine is front crank and middle of transmission. That is why I say a nodal is a moot point. With my rear spring hanger/clutch linkage in that area it just makes too many potatoes in a bag to deal with.
I again assumed this clutch housing would automatically changed it to dual disc even with push clutch? Again, I have no clue about this stuff. If I can just bolt this up to my existing flywheel/clutch, great. I assumed it would change? I don't need more clutch. It is a composite disc and has plenty of grip.
I was curious if the housing would be 8" or 6" deep like mine. That I would assume would denote single or dual?
My car stuff is one and done. This is all Chinese to me. I get sae # 1 or 2. Does 1 mean single disc? #2 dual disc?(Besides other size changes).
They list that 4.375 to shaft, I will confirm what mine is.
Machining the cross hole is doable but reaching across that length in one drill and then procurement of a ream would be tooling out of my pocket. We have stuff but not for parts like this.