extractor question

[xtratoy]

Looking at Midway and Brownells they only show one extractor for 110 type rifles. Are the extractor for a 223 and a 308 bolt face the same? Can you use the same extractor for 10 and 110 rifles? Buying a Stevens 200 308 tomorrow and am getting another bolt face for 223 when they are back in stock so I can do a 22-250 and 204 Ruger swap barrel gun. The bolt head is stripped and doesn't come with an extractor or ejector or the springs and pins to hold them in place.
Has anyone removed the steel pillar out of a plastic staggerfeed stock, epoxied the hole closed and redrilled and reset the pillar to match the 4.40 spacing of a centerfeed action? The Stevens 200 I got today has the 4.40 spacing and I wanted to use my other stock (4.25" spacing) when I put my bull barrel on it. I don't mind using the plastic Savage stock if I can make it fit. My biggest question is if the pillar can be pressed out without destroying the stock.