UAW members they are, but as with most line UAW jobs at Bowling Green, you have the same task that is completed in less than 4 minutes until the next same thing occurs again on the next car, I would think you become expert at a very simple task or replaced or reassigned. As for the engine builders, about 3.5 hours to build a Z06 engine for example and not handed off to another builder if you don't complete that engine it waits for your return to work. Again, doing the same task could lead to an expert at that engine vs. a high-performance engine builder that does many different types of engines. As far as spec, handled by GM's professional design team and they got 670 hp out of 5.5 naturally aspirated, nobody else has. As far as "blueprint'" a new virgin block that is decked and it is balanced as well as heads cc'd, so what is left to "blueprint"? Not resizing connecting rods, not shot peening forged rods or using better rod bolts, maybe a new titanium new rod is blueprinted so to speak.

To me different than a line engine that is mostly robotically assembled and shipped to be installed like the LT2.

I appreciate that someone might have a sense of pride in assembling an industry leading engine not assembled by a robot and take pride in their assembly - just a perspective.