you really need to do your research. your all over the place right now and you really need to spend some time learning what it takes to get the kind of power your looking for. its not a matter of simply slapping on a set of heads, headers, or a supercharger; theres a lot more to it than that
you need to ask yourself things
~ can my suspension handle that kind of power?
~ do i have the correct fuel system mods to support 400hp?
~ do i have the knowledge to do all this work myself?
~ do i have the money needed to reach these goals?
when i first joined AFM, i didnt know shiz and i made a similar thread like this looking for 500+hp (
http://www.allfordmustangs.com/forums/5-0l-talk/224466-budget-500-hp-n-build.html). i had absolutely no clue what else was involved in making that much power. its been about nine months since i posted that thread and i can not believe how much ive learned since then. my goals have gone from 500+hp to 300hp.
you really need to stick around, read up as much as possible, and pick up a book. i recently bought a book on rebuilding the small block ford. ive read it cover to cover three times in 5 days and im learning more every time i read it. you need to spend your time learning before you pick a final goal...