Is a 7.25 rear strong enough?

On the earlier topic of what I presume is be a “lunchbox locker””, some of the later FJM 7-1/4s and Ford Grenada and Fox bodies with 7-2:4s started sharing some parts with the Dana 30 and I think the Dana 35. The Dakotas most certainly did but making one fit in an A body would not be worth it. You may be able to find something along those lines, but your best bet may be a Ford Ranger 7.5. The most basic first level upgrade past a later 7-1/4 with more strength this side of an 8-1/4. They’ve got a 4.5 inch bolt circle, and aftermarket support was reasonably good the last time I checked. The hub to hub length was compatible, it just needs perches welded to the bottom of the axle tube. I still cuss ChryCo to this day for not using a Dana 44 instead of the AEM 7-1/4 in base V8 cars.