I have a Winchester Model 70 Classic Super Grade in .30-06 that I just killed my first deer with. I'm very fond of this rifle, but have a couple of questions about it.

The first is when was this rifle made? The serial number is G158xxx. I've tried looking it up on a Winchester collectors' site, but it says that my serial number is invalid.

Next, I've heard that the extractor can break and I'm not overly fond of the two piece floor-plate/trigger guard assembly. There's a company (I think that it's Williams Firearms) that makes CNC machined replacements for both the extractor and bottom assembly.

How much would it hurt whatever collector value this rifle might have to do the slight inletting required for a replacement bottom assembly? I'd also like to replace the extractor and was wondering if anyone had any experience with this and how hard it is? I'd certainly keep the original parts with the rifle, but I'd really like to make it as close to my ideal as I can.

TIA

Cassady