67 c10 shortbed, how do you make it hook?

[racindego]

I have a 67 c10 shortbed that i am trying unsuccessfully to drag race. heres my situation: I have stock rear control arms with coil overs, 150 pound springs. The truck has 29.5x11.5x15 hoosier quick time pros, brand new, with 15 psi. The truck is currently mini tubbed and I dont want bigger tires. My pinion angle is very close to dead on where it should be. My front susepension consists of tubular a arms and shortened springs, very soft setup. My fuel tank is directly over the rear wheels and my battery is in the back passenger side corner. The truck has a full 12 point cage. I would estimate the weight to be 3400-3500 pounds with me in it. I eventually want to come off my trans brake at 4800-5200 somewhere in there. My motor makes somewhere around 650 horsepower. Right now, at the track, my launch looks more like a second burnout. Truck barely even moves when I come off the brake, even at lower rpms. am i missing something? I know people make these trucks hook, I have seen pictures of them with the wheels hanging. Do i need a four link? Where do I start?