Engine build questions

My brothers friend has a 306 block sitting around and with me questioning my motor and using nitrous frequently on it, it has me thinking. Now what rotating assembly would you use and some other things for the motor?

To be completely honest i have no idea about anything when it comes to building a motor...

I do know on the top end I would probably put either AFRs, Edelbrock, or Trick Flow heads and then the cam I would probably get a custom cam....

This will also be a nitrous set up so I would want forged pistons and such.

Also how much is labor normally (estimate) to take out my engine and install the new one?

Thanks,

If anyone can help or give some input

anyone?

Like which ones of these would you go with?

http://www.dssracing.com/306rotate.htm

and like what else?

I am really lost...or do you normally just find someone to build it and tell them what you want and they just buy everytying?

Man...I just made an excel sheet up with some of the things that i need and i know im missing stuff and it already came out to be close to 6000...I dont even know if can get that much money together which is going to suck if my motor comes out to be screwed up.