Here's my dilemma. My son and I are rebuilding a 225 slant six '74 Dart Sport. While separating the manifolds to install the metal gasket included in the engine rebuild kit, several things became apparent. The one stud running through the middle of the manifolds near the carburetor was burned (rusted) through completely and broken off in the exhaust manifold. I suppose I could drill it out and re-tap the threads
We pulled off the EGR valve and couldn't believe our eyes. The openings into the manifold were completely clogged and packed tight with carbon buildup. It couldn't work if it wanted to. Also the entire chamber between the two manifolds was packed solid with crud. Finally, the heat control valve in the exhaust manifold wasn't functioning because the small stop pin which is pressed into the side of the casting and secures the thermostat spring has burned (rusted) away. The whole thing just flaps freely in the breeze. I suppose I could follow the chassis manual instructions for removing the heat control valve and re-drill the stop pin hole.
Let's face it, the whole thing is messed up.
So, here's my choices. I have found in my local scrap yard a couple of options. A seventy-something Duster has a decent looking manifold set (from outside appearances) with the same one-barrel intake ours has. Although, the heat control valve seems to be stuck. Maybe just needs a shot of solvent. The other option is a Super Six setup in a '78 Volare. It has the carburetor (I need some help from someone in identifying the type from its corner tag), all the throttle linkage, and the air cleaner and lid (with the decal intact). The heat control valve seems to be working fine.
First question: What is the significance of the "Super Six" name. Is it just the distinction given when Dodge went to a two-barrel carb, or is there more to it than that?
Second question: Will all the emissions control, vacuum lines, and everything else I don't know anything about all work in this conversion from '78 to '74?
Third question: The Duster's manifold had a block-off plate where the EGR valve should have been. Assuming that mine still works, should I just bolt it back on, or does it actually need it to run properly? I plan to post a separate topic regarding the whole vacuum and emissions thing.
By the way, the Super Six manifold set, carburetor, and all linkage will cost me $65, if that helps in making the choice. Thanks for any input.
Jerry