I bought, but haven't received yet, a rifle described as a mid to late 70's J series in .220 Swift. Been trying to learn by reading and cannot find a definite answer to whether I can use today's parts to change the bolt head and baffle to a .223. I've read that the very early rifles had a "C" type extractor that later changed to the current style. And, that some of the earlier bolt heads had the hole for the pin that holds the head on in a different location than today's rifles.

Can anybody shed a little light on my chances of doing a conversion to .223?? The rifle should be here by the end of next week, and I'd go ahead and buy the parts if I was 100% certain it was doable.

Hank