OK well got some useful things done, the replacement computer (my old core2quad) is up and running finally, in pic below you can see it sitting on top of the cabinet hooked up and working. Video is currently output to my man cave TV as I am still waiting on my 4/3 19" LCD to turn up.. To get the original speakers working I hooked up a small (15w rms) 12 volt amp to the existing speakers, power is drawn from the PC's PSU.. Now that I know it will work I can start gutting the system/screen etc in the headbox..
I also got a rivet tool (will come in handy) and put in the new stainless steel ramp..