even at 8 lbs you need to have some way to increase the fuel ammount in order to not lean out the mixture while in boost. You could use a programmable ecu or you could keep your ecu and run the vafc hack or similar. you shouldnt need to upgrade internals as long as you are going to be using reliable parts and your boost doesnt creep over that. I stated in another thread that you should expect to spend about 2.5 grand on a decent setup. That didnt fly too well with some people but I still stick by it. I spent over 5 on everything I wanted to do on my setup and that was piecing together my own setup. so you can kinda see that you need to kinda come up with your own cash ceiling and choose parts from there. the lower the ceiling "generally" the lower quality parts. and lower quality "generally" means lower reliability/more problems.