how much suspension travel???

[pacman1967]

I am building an 85C10 leaf spring street/strip truck . I am having issues with hooking up. So I am doing my homework and putting some time and money into my suspension. I already have Cal-Tracs on it but I am not getting a lot of weight transfer. So I plant on upgrading to a double adjustable shocks and relocating them so they sit straight up and down instead of one angled forward and one angled rearward. How much travel should my rear suspension have. I know the stock shocks have around 10" of travel but that seems a little excessive. I read though my shop manuals and looked around online and cant really find how much travel these trucks had. I also dropped the rear end 4 inches with spring hangers and shackels. Thanks in advance.