A few questions before I start my project

[brett67]

I have owned a 67 LB since I was 13, It was my daily driver in highschool. Im now 25 and its been setting up for about 6 years. Its still looks good, no rust, no dents, semi shiny red paint. I want to get it back on the road. My plans are too shorten to a SWB, put a vortec 350 and 700R4 in it, new oaint, lower it and put some nice wheels on it. I have a few questions before I start though::
1. Should I shorten my bed even though its pretty much flawless, or should I just sell it and buy a SWB bed?

2.What could I sell my lwb bed for? no dents, one sratch, no rust, good paint.

3. What is my original running 283 and powerglide worth to sell?

Thanks in advance, Brett