4.6 or 5.0 which is better?

[snisbet375]

my engine has over 80000 on the ticker. How much boost can i add safely, without destroying an old motor? Or should i go ahead and rebuild and plan for blower? Do they make engine rebuild kits for the 4.6? I havent seen them anywhere. I just found a site that told me that the difference in the 96-98s is the heads and cams. And to go and buy heads from a ford dealership for a little over a grand. It would make big power. So i think ill stick with my mustang for now.