Oil Filter Adapter

If it fits your car ok now, I don't see a benefit in replacing it with iron. An aluminum one is probably not a true 90 degree adapter like the iron ones that came on Early A bodies like your Dart, with 273 V8 engines. The later adapters like you have, will sometimes make the oil filter hit the frame rail. If yours isn't hitting, I wouldn't worry about changing it. Link below shows where all 3 gaskets go, but I always replace the fiber washer that goes under the bolt head with a big copper washer. Never had one leak there yet by doing that.
https://www.forabodiesonly.com/mopar/threads/oil-filter-adapter-gasket-location.469768/