It would be nice to be able to fully understand the resentment felt toward hybrids by the "purest" so that a direct defense (or offense) can be developed early on. When the Z was more ubiquitous, it didn't matter what was done to it, because there was any number of others that could be seen as a prime example of what Datsun created. I feel that 20 years ago, the purest didn't exist because the Z was seen much more frequently. Now days, the Z is not seen nearly as often, and I wonder if this sense of "loss" to the purest is exasperated when an potential example of an unmolested, and hard to find, example of the Datsun history he so much enjoys to relish in, is now only a partial history and no longer represents the "pure" picture of what was created. The purest has no other place to satisfy his hunger for the total Datsun experience. I feel that in the future, the polarization of purist and hybrid will become more distinct as there become fewer examples of this fine design.
I don't feel any amount of rational, point-by-point explanation of "why" we do this will provide much merit in their eyes because I feel the purist is motivated more by emotion in their opinion. To attempt a debate using numbers will have no effect on the opposition. Obviously the numbers speak for themselves, and cannot be disputed, but your task will be the emotional aspect of soothing their apprehension, concern, and opinion that "we" have removed, from a dwindling number of Z's, the history of this Datsun creation. A new 350Z with a 500HP N/A V8 today would be a unique vehicle that would not draw near as much "purest" commentary as it will 30 years from now.
Perhaps convincing them that a hybrid is better than no Z at all will provide a more compelling argument. How many Z cars, wasting away to nothing have been saved simply because one felt that it would be neat to put a V8 in it and end up with a nicely, semi-restored example. The only reason I bought my BlueovalZ (bad example here) was because of my desire to build a V8 Z with a Ford engine. I had no desire to mess with the OEM L6, and with that said, I can almost guarantee that this Z would have rusted to nothingness in the back of the previous owners yard.