Catch-Up Digest, Continued. After this I’m up to date. ••• March 9, 2026 They said it couldn’t be done.* If you have been following this project long enough (good job 👍🏻) you know this engine had SUs when I installed it. Lots of drama later I put triple Mikunis on it, and I’m glad I did. One thing my euro-spec SU balance tube has that my short Mikuni manifold is missing (other than clearance) is a PCV valve. Around the time I got the triples working I installed a bracket to hold one with a plan to figure out how to connect it later. Well, later is here. Several years ago I saw a Z at the east coast import show in PA sporting a custom air filter housing for a Lamborghini Countach air filter. The owners is here but I can’t find the name. We ALSO discussed its balance tube on the manifold. My plan was to do something like that, but add a port for the PCV valve. (Nismo put one with a PCV valve on the l型6気筒 TLX manifold, so please hold the snark). I would have liked to figure out a way to mount the valve right on mine, but routing the hose was getting too difficult. This cleans up the visible plumbing better. Hopefully it with function as intended. My vacuum manifold also uses the port on the #6 runner meant for the brake booster, so I move that fitting for to the back end, as well. Eight ports in all. It’s made from a 22.5 inch piece of aluminum pipe (1” OD, 0.25” wall for tapping, which is technically not enough but works). A buddy of mine was MVP on this for welding up the ends, getting my specs into his CNC machine to bore all the holes, and letting me use his lathe and mill to start the guide taps. A quick media blasting with aluminum oxide and it was pretty simple to install. The hardest part was getting 1/4” stainless tubes bent to the right angles to accommodate the irregular angles of the six manifold ports, which are so irregular they must have been drilled and tapped by hand. Lest I create the impression this was a complete breeze, know I finished a prototype meant to be final using a vacuum manifold, but bailed on it after the tubes started to look like a mess of spaghetti. Pro tip: if you’re doing something like this, get some copper tubing at a hardware store and mock it up with that before you start bending stainless. I’m pretty happy with this. The only thing I would change is to use thinner walled stainless capillary tubing. This stuff is unnecessarily robust, so it’s hard to bend and a smaller inner diameter than it could have been. *I don’t know how the balance tube will change how the engine runs. The assumption is slightly smoother, with the brake vacuum building faster at 6 times the frequency. ••• March 11, 2026 Nearly done in here. I picked up these Kameari stainless air filters on a whim from JDM Car Parts a while ago, and I’m glad I did. They look really nice paired with the heat shield (also from Kameari). I was nervous the shield wouldn’t fit with the cooling blocks installed, and it is tight, but it isn’t touching them or the header so I think I’m good there. The braided cooling block lines look nice over that shiny stainless steel. I’m still debating whether to get some short velocity stacks that will fit inside these filters. I do have a plenum for a cold air intake, and I think the old stacks are short enough to work in that, but I think it’s going to be a while before I get to that. Everything is back where it belongs now, except for the throttle cable and the booster hose. I remade the cable bracket out of thicker gauge stainless to get rid of the flexing problem with the previous version. As such I need to make some adjustments to the cam (and replace the barrel nut I lost). The hoses I need to reroute and trim to connect to the vacuum manifold I just installed. Otherwise I just have the windshield wipers and water tank to put in here and I’ll be pretty much done inside the engine bay.