I actually went to jdm engine corp today over in Richardson. I saw a nissan maxima on fire on the way there, poor car must of had a terrible owner.
They didn't have any rb26's in stock he said. They had a rb25 with trans and everything that I looked at for 1900. Told me it was a series 2 and woman at front told me it was a series 1, so like you said dwarlick they don't really know. It was an r33 series 2 rb25det. Supposedly there getting a shipment around the first of april so I will go check out what they have then. I plan on taking my time and waiting for the one I feel is right. He also told me that he will bundle an rb25det trans with an rb26dett motorset. I didn't ask a price but ill worry about that when he actually gets something for me to look at.
-Pat