Home built tube chassis in process

I have a 73 dart that I am putting a 400 in. I need the front end completely gone through and header selection for an A body are expensive or fender wall which I do not want. I am going to build my own tube chassis. I have never done one before but my father in law said he would help. He has been building race cars since the 50s. Here is the set up that I think I am going to base mine off from. Some things I like some things I don't so there will be some changes and there is no way I have 4k to through in a front end. That is my budget for the hole car. If any one interested I will post pictures as I progress