I have a 16Ga. Winchester Model 97 pump. The barrel has been chopped off to 24". I have a new 30" barrel and I think I would like to install it on this gun. Is this something I can do myself or would I have to take it to a gunsmith ? I am mechanically inclined, have about any tool you could want and have built and raced cars all my life. I have had very little experience working on firearms. Suggestions ?