Quote

" Regarding your bolts: Lee Enfields were intended to keep their original bolts. If your headspace is OK with the matching numbered bolt, then I would keep them together. (Standard disclaimer: consult a qualified gunsmith). If you really wanted to cannibalize,I suppose you could swap the firing pins and cocking piece between the bolts, so that your locking lugs still match up but you get the benefit of the cocking piece safety, but honestly I wouldn't bother. Either bolt should work fine if the headspace is OK. Personally, I would keep the original bolt and keep to Jeff Cooper's four rules of gun safety."

Not really possible , with out cutting off the safety support housing at the rear of the bolt , as far as I remember ?