I have a question  on handling my boat has a blue printed  berkley  plans out fast handles really good till top speed then seems like the nose wants to dive in an start to go left I have to correct  the steering  an it starts to get a little squirrely is it that I'm getting  more mph that the haul is good for or do I need to add something  to my jet drive

With a question like that, I'm going to bet you are not pushing the limit to that hull.  That hull without any modifications should handle great well over 80mph if you're making enough power to push it that fast.

I'm guessing you have another issue causing your problems.  Get a few pictures of your pump set-up and intake/loader/shoe set-up and someone should be able to see if there is an obvious problem.