The driveshaft was delivered to me by FedEx today. During attempted installation, I found that I had to remove some of the original shield. I did this manually with a hacksaw, removing a linear inch of the shield. I measured and ran a piece of tape around the shield to mark where to cut. The remainder of the shield is of a slightly smaller diameter than the shield that is pressed into the tail section of the 240SX transmission. So, it slides within that shield, but with a small air gap.
Assuming they removed 2 inches as I specified, I am kind of surprised at how tight the fit is. With the driveshaft installed, the front portion of the shaft (with the spines) is deeply seated inside the transmission. I will add a pic, but essentially, another 1/2 removed from the shaft would have been better. I don't understand why all the references I have found online for shortening the stock driveshaft for 240SX transmission conversion don't seem to match my situation. I confirmed I had the short (early) driveshaft. But instead of shortening by 2 inches (what I found others have done and as I asked for), I think 2.5 inches would be better.
With the driveshaft in the car, I moved on to installing the Z-Story exhaust. The header was already installed, of course. So, I unboxed the rest of the parts and put them on the car.
I found the fitment to be very good. There is one spot where the exhaust comes within 1/4 inch of the transmission case. However, clearance seems to be enough everywhere - I do not think there will be any rubbing.
I also filled the transmission with Redline 75W90 GL4. There is a small list of things that have to be done before I can start the engine.