Re: dragunov rebuild
So I did a little research for ya. Looks like some have replaced the barrel in the past, and gone the heavy barrel route as well.
The only thing I have not been able to find is the threading to the action. Get a .311 blank, which is not hard to find, and have the threads identified and duplicated. PTG makes a reamer for the 7.62x54R. The only thing you will have to put work into is the handgaurd and some kind of gas block for the gas system.
I dunno what the rifle is worth, or worth to you, but you may end up spending more than the rifle is worth. But then again, I have seen more money and work put into worse.
Sounds like a job for Red Jacket. LOL, j/k