Sorry I'm going from memory, I thought stock was 78 and intake manifold was 80. Maybe I'm wrong and it is 74 and the intake manifold is 78 or 80. I know the manifold is either 78 or 80. I was certain the stock TB was 78 but now that he said 74 that sounds right too. Been about a year since I measured all this stuff.
Breathing in and out is good enough for me.