You don’t need to replace the ash bucket. The new replacement ash buckets will not fit without some modifications( usually involves hose clamps). There’s multiple old threads on this site for this topic. Also, you can put modern H style sweeps on on old bucket with the bar, but it will also require some modifications. Again, use the search function to find old threads. I redid an SSP like yours last spring. All the info you need is on this site.
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