what cam would be best

[HP400RW]

i got some work done to my 89 5.0. I got 75mm mass air meter, 70mm tb, edelbrock performer intake manifold, hedman headers, pace setter off road h pipe flowmaster cat back, kirban underdrive pulleys and 4.10 gears. the car pulls hard off the line and mid but then kinda dies out. i want to get a cam that would give me great power especially at the mid to high end rang. what cam would be great with all these upgrades. any help appreciated

thanks
dan