Yeah I don't understand why anyone would want the 90° adaptor if you didn't absolutely need it. It just adds more sealing surfaces to leak. With Dougs or TTI's on a 67+ A body just use the PS-2004 size filter or the MP one I linked earlier, they fit great and are standard equipment on a TON of engines both larger, smaller and newer than any LA engine.
Seems like everyone is getting caught up on the physical size of the filter, but the external size of the oil filter is only one component of how good an oil filter is, and it's not the most important one at all. You can have a giant filter that's cheaply made and has very little filter surface area, and a smaller filter that has a ton of pleats/folds and therefore much more surface area for the filter.