Welp...
The injector O-rings I was using on the old manifold are not sealing up with the new one. (bang) I am hoping that the dealer has some in stock for me to pick up tomorrow morning, and if not then I'm going to get them coming from Amazon for a Wednesday delivery. In a way this is actually kind of good news, as it looks like the OEM rings are going to work perfectly, so you guys should be able to just swap your existing ones over. Just a stupid oversight on my part to not realize that I didn't have any of those laying around anymore. (bang)
Everything else went perfect with the install, and it looks fantastic in there. Really happy with how it all turned out. (naughty)
I especially love how the vac ports being moved to the underside really cleaned up the overall look around the manifold. It wasn't as bad as I thought it would be to get all the lines hooked up from the top, so I didn't have to jack up the car and do them from the bottom. The space between the firewall and manifold is a little smaller than the 1st/2nd gen manis, but there is still plenty of room to access the oil filter from the top (which is another little bonus that I always loved about these manifolds).
Thankfully the weather is supposed to stay consistent here this week, so I don't think there will be any problems with using my baseline accelerometer numbers that I gathered today. I did 20 pulls (5 pulls in 4 different spots), and the numbers were solid across the board from spot to spot. I will repeat the exact same runs for the "after test", and it should be very apparent if the new manifold is performing any differently than my 1st gen. If there are any big changes up or down, I will go ahead and schedule some dyno time.
Lastly, apparently there is nobody in New Mexico that has a flow bench for testing manifolds. One place here in Albuquerque has a set up for heads, but he says he isn't set up for doing manifolds at all. So since I can't be making a trip to Phoenix or Denver with my work schedule, I won't be able to get those numbers versus the stocker.
Here's some pics that I shot today: