Well, here is an updadate.

I have installed the Weiand intake manifold, the rebuilt 625 cfm carb, the thorley headers. I then brought the truck in and had a Pro shop tune the carb and set the timing and play with the advance curve. This truck has electronic ignition and a mallory coil of some sort. The vacuum advance is not hooked up, it is being done with springs, and weights i believe. The advance curve seems to be better, way more power accross a nicer power ban, BUT when i get on the freeway, i am having detonation pings when i stomp on it. The engine is at roughly 3000 rpm when this occurs. I have super unleaded gas in this thing, and just to see, i dumped an octane boost in one of the fuel tanks. IT STILL has that PING at higher RPM acceleration. My compression is an average of 190psi, in this 390 motor. Is retarding the timing the only thing i can do? Or will that heat up my valves again. Maybe i should just poor a bunch of gas on this truck, and burn it. This is really frustrating. Any suggestions very much appretiated. I didn't have enuff money to just let the shop fix it, so they did roughly 5 hours of work.