This is what I did to my Norinco SKS for shits n giggles...
The 1" extension on the buttstock was the first thing I did. I thought it was really short too and that extension was a cheaper alternative to putting a crappy plastic stock on it.
I removed the spike bayonet after installing and pinning that break. The break rendered the use of the bayonet obsolete.
I put on the bipod after that. The quality isn't all that great, but it serves its purpose, especially for being mounted on a rifle that only cost me $150 to begin with.
The scope mount itself turned out to be a better quality than I had hoped. It's pretty sturdy and so far I haven't had any problems with it going off zero. The scope is a cheap Leapers, I didn't feel like wasting money on a high quality scope at the time but plan to put a better one on there in the future. Oh, and the shell deflector is a must if you scope your SKS, keeps those pesky shells from bouncing off of the scope itself.