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Those bell-shaped things are the solenoids for the emission control system- these cars used to have thermal reactors. Do you see the circular plate on the intake manifold? That used to have a copper tube in it for air injection.

This car looks very nice, I would resist the temptation to make ANY modifications. Well, maybe get rid of that Stant radiator cap.

I had a heck of a time fitting 15's under the wheel wells of my '75 2002 (VIN 2366288, never forget that)- it's one of those things that is very trial and error. A set of E30 325iX basket weaves would be cool, although panasports are period.

The rubber shift gaiter (seen in your photo as having come off and fallen below the console) was superceded by a vinyl one-- the rubber itself puts pressure on the shift lever and can pop it out of gear. In any case it's not correct for a '76.

That is a Weber carb, probably a 32/36 DGAS (the A is for AQUA, as in, water-powered choke), with mechanical secondaries. Not a bad carb and with the original cam will idle OK. Dual side-drafts with a TI air cleaner would be a very cool sleeper mod.

Great car and lucky find in good condition, I would keep it as such. My first car was a 2002 and I'll never forget it-- fun and easy to wrench on.