Osac valves and emissions junk

Rainy Day Auto said

So this might seem odd to most but I'm kicking around ideas to connect the osac valve and all the original smog parts without actually connecting them.

I would like to run a non functional vacuum lines just for looks but not to actually use these parts.

This is a 74 duster and to me it just looks more complete and better to my eye to have everything mostly appearing as it did in 74. Any creative ideas how to accomplish this

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What's on that engine? It will make it a lot easier to say what to do with each system.
Post a photo of the vacuum diagram if there is one under the hood.
Otherwise one from owners manual may have to do.

OSAC is the main one that kills performance. If it can be disabled so it works like its very cold out all the time, then you can run the vacuum line through it so it looks stock.

EGR dpends on what flavor is on that car and engine. Doesn't hurt if its working.
Vapor control needs to work correctly or the fuel tank won't vent. Carb venting to it may or may not be critical - depends on the details of whats on there.

PCV of course you want to work right.

Are there any electrical solenoid gizmos on the distributor? Carb have solenoid idle?