Yup,most parts are interchangeable if you are talking about 48 and newer 226's.
The "trick" way to get duals on a shoebox Ford with the 6 is to use the front half of an exhaust manifold from a truck,and the rear half of the car exhaust manifold.
Yeah,you do have to weld them together in the middle so you have heat for the intake if you are using a cast iron intake,but most of the aluminum aftermarket intakes don't have provisions to bolt to exhaust manifolds.
If using a after-market aluminum intake,you can just weld plates to the cut off ends,but some people say to get the most power and the best sound you need t weld the two halves back together with a plate in between them that blocks off 75 percent or so of the opening to create some back pressure. I have no idea if that is true or not. I am just repeating what I have heard.
