Raavihn

Greetings Ladies and Gentlemen! I am looking for some advice with my new to me truck. I don’t have a lot of auto repair experience, but I learning how to maintain and repair my vehicle was the biggest reason I bought this Datsun. I recently acquired a 1979 620 with the l20 engine. I call her Dotty Lookfar, like a boat because she drives like a boat. The last owner said it had 108k miles on it but I don’t know how to verify that. He also lowered the back on 3’’ blocks and tweaked the torsion bars down. So it looks super cool but drives terrible. He also installed a weber carburetor, a bigger alternator to accommodate the stereo, sub, speaker and painted her flat bomber green. She leaks a little, diesels, idles at 1.5k, but runs ok and has issue described below. This issue I need help with is that I live in Portland, OR and Dotty failed DEQ quite spectacularly. It showed that she is fuel rich and possibly burning oil. Since then I changed/topped off all the fluids/oil, and filters. When I was changing out the Spark Plugs I noticed that Cylinder 2’ plug had a bunch of build up on it. My step-dad helped adjusted my fuel regulator on the carburetor bit. Now when I start her there is bit of smoke that comes out of the tail pipe and she the exhaust still smells rich. I was hoping that I might receive some guidance on what I should prioritize on in order to pass DEQ. Below I have pictures of the engine. When I was looking at things I noticed was at some point in time I believe the smog kit was removed, and there are two tubes that are clipped coming out of the the exhaust manifold. I do not know if that has anything to do with anything. Any advice is welcome and thanks in advance! Engine Front Engine Passenger Side Engine Drivers Side Clipped Tube 1 Clipped Tube 2 Dotty Front Dotty Side