In the process of checking in on the health of the motor I ran a leakdown test on it and found that most were in the 20-35% range based on my Harbor Freight gauge. That's a lot, but still in the "good/acceptable" range on the gauge. I did this test to confirm whether or not I had a head gasket or other leak into the cooling system. After using the gauges I hooked 60psi of shop air to each cylinder and listened for where the leak was going. All of it in each cylinder was going directly to crankcase...so I know my rings are where the wear is at. This is slightly puzzling though since my rig really doesn't smoke much. It'll do it under engine braking or on its side, but not just running around. Anywho...that's that.
One of the things that I knew I would need to do is come up with a way to secure the plenum to the carbs so that when the butterfly's shut when I left off the gas under boost it doesn't blow the plenum off the front of the carbs. Fastspec2 had used a turnbuckle type setup to tighten it down, but my plenum ended up pretty close to the face of the carbs so that was going to be more difficult. What I decided to do was pick up some 4.5" hose clamps and put them around the plenum and the spacers between the carbs. So far it's working good.
That got me back on track to tune things. As ya'll have seen I'd set it up with nipples in the plenum and the carbs to boost reference the float bowls. I wasn't sure how well that was going to work since I was so use to a pitot tube type setup with the Harley carb. So what I did was hook up my old pitot tube to some hose and split it off to each carb. Previously with the 210 jets and the nipples I was seeing it get really rich under boost and start bucking under power. Since I'd been trying to sort things out and had set them up with 160 mains to try things NA I decided to give them a shot and see where that put me for AFR's. To my surprise things worked pretty good...still a little rich though. So I put a set of stock jets in which are 115. Under boost the thing has plenty of power...it's pretty substantial compared to the Harley setup I had before.
It's got a slight delay on initial throttle application that I need to work on though. After talking to Fastspec2 again I believe I'll hook the nipples up again and work my way back up in jet size to see where that gets me. I may end up needing to adjust the float heights too. Most of what I remember reading in older threads said that they needed the floats set to be level with the edge of the bowls. At this point mine are angled below the edges which has me wondering if I'm overloading the needles.
I also picked up another tubular exhaust manifold while I was out since the one on the Tracker had cracked and been booger welded back together. 
It looks like it was bad before I ever touched it judging by the coloring of the material. 
