I am doing a 5.3 swap in my 2wd blazer with teh 5.3 it wieghs 4000, it has 3.73, when it is finished it will have headers, some sort of intake, duel exasht, dyno tunned with hp tunners, is it possable to do a cam only to my other mods to get 13's, if so what kind of cam?

 

It is very easy to go 13s with those bolt ons, a decent cam, and traction in a vehicle of that weight. I'd do a 224 cam and run 13s(possibly 12s depending on traction) all day in that setup.