Glenn:
You can't really use the headers they way they are. The flex tube is not welded to the header but appears to be attached in some fashion and then some old fashioned "muffler patch" applied/gooped at both ends. This is a little bit of a disaster waiting to happen if the junky stuff fails, you will get exhaust fumes in the cab and all that, not to mention the mess exhaust makes in the engine compartment. Those are pretty old headers by the way. they look like Clifford Headers, and if they are, Clifford has not sold long tube headers for a good many years now. So they may be 20 years old or older if they are. Clifford only sells the shorty style headers now.
If the headers are too much of a hassle, and they are for a lot of people, the simplest solution is as the others have mentioned, replacing the performance stuff with a stock exhaust manifold and intake. Factory parts, bolts right on, all the nice daily driver parts are present, reliable.
As to the Clifford intake, they come in two flavors, and a few variations. The older Clifford intakes did not have provision to bolt onto a stock intake, and were not set up for water heat. Some sort of had a chamber on the bottom that you could weld a plate to and run some water but no one really did that. There were a couple of design changes with these older intakes but none had a real heat chamber of any kind.
The newer style Clifford intakes all have water chambers cast into the manifold that allows you to easily run hot water to heat the floor of the intake to approximate the function of the exhaust heat riser. The Clifford on my 261 is a newer style and the hot water works well.
So what style Clifford intake do you have, the old style or the new? If you are not sure, post a photo and lets take a gander and see what you are working with.
