alright recently i put a 5.0 from a 95 gt it has a gt40 heads a big cam rollar rockers and a msd power coil and for some reason it keeps on spark knocking or something like that like no power no matter how much i advance or retard the timing it still does and when ever i first start it idles fine but as soon as i start driving and go to a stop sign or whatever it wont idle and die and it is hard as crap to start like it floods itself out or something any ideas what could be wrong?