Ok, lets help you out, after all, thats what your here for, you got a stang with a couple bolt ons, better headers, good call, underdrive pullies, not so good, cooling and charging issues are not worth the couple horses you get.
Street/strip cam is a relative term.
If you want a good running dailey driver then plan a head, cam and intake swap, lots of choices there. A gear change will make a bunch of difference, plan a brake upgrade and sub frame connectors, make sure your bushings and ball joints, rear upper and
lower control arms are good.
Does no good to go fast but not stop or turn.
There are a couple threads in the 5.0 tech section. Go to tech/how to threads and look for upgrades that have been done, salvage yard parts that work and testing procedures, if you have a problem now adding stuff will make it worse and harder to diagnose so check for codes, you can have codes present and not have a check engine light on so you may not know about a problem.
So make a plan, what you are going to do with the car, its important.