On the piston size, the markings on the top are in mm. so if you have a 1.0, it is .040" already. I don't remember if Nissan made anything but .5 and 1.0mm over.

A few weeks ago, David Spillman had a wrecked 260 that has been behind his shop for a few years loaded up on a trailer looking like it was going to the metal yard. I looked longingly at it, but I have a good engine in the car and a good spare L26 block and two others that are usable. If he still has it, it may be something to get you back on track until you get your primary back up.

I have some stock head bolts and some aftermarket equivalent to the diesel main cap bolts I can hook you up with cheap. I also have a torque plate you can borrow to get it back right. Really makes a difference.

Mike