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I need an early 1970 intake manifold with a balance tube that does not have the bosses for emissions equipment. I would also buy just the balance tube. This balance tube came on some early Canadian cars, and might have come on early Euro and JDM cars also. See the attached photo for what I mean, which is a photo of VIN 003778, which was sold new in Canada. Any information on where to source one would be welcome.

Hi, so I am in the process of converting my car from flattop to roundtop carbs. I have the intake manifold, balance tube, and carbs for both setups. The engine is an L28 that came with flattop carbs on it and a mess of hoses and wires. I need help identifying hoses and figuring out what I don't need, etc. I have removed the flattops and their balance tube, then bolted on the balance tube for the roundtops to notice that there's no spots for some of the hoses that are there. I have pictures attached. The next thing I noticed is the roundtops won't fit on the manifold and need the larger bolts of the manifold that came with them, so does this mean they won't work on the n33 manifold? Next, there's no spot for the coolant hose, does this mean the roundtops don't need coolant, and if so, how would I remove this hose and block it? As you can tell I am pretty clueless but thanks for all the help!

After 2.5 weeks of waiting, my new carbs have arrived! I decided recently that I needed to kick start things with the Z and do something to get me excited about working on the Z again (although the sun coming out really helps lately), so I called up Ztherapy and ordered a new set of carbs and a new balance tube. Next week is dead week and finals the week after that, so it's likely that I won't be swapping anything till spring break. Until then I'll just have to enjoy looking at these beauties.