I currently have a 98 GT with the mach 460 system. I am swapping my stock cd player to an 04 mach 460 head unit. I have new speakers that I would like to put my new speakers in, 6x8 components. First question, how difficult would it be to bypass the mach 460 and run and aftermarket amp on a stock deck, or should I just use the stock amp and just install the new speakers in their place? Thanks for the help.