Here is a pic of the headers I picked up from Ebay. I seen that other indiviuals had recommended them. I am pleased with the quality of them. The flange is about 1/2 thick.
I took the Turbo 400 yesterday to the transmission shop to have it rebuilt. I am having them build if for the track. I didn't want to have it built twice so I am having it built for when I go pro street with the truck. They are building it for around 800-900 HP and 1000fp of torque. I am also getting a large oil cooler for the transmission. I also purchased a 2200 to 2500 RPM stall convertor. While the transmission is at the shop I am going to get the 350 ready to install. The serpentine setup from the 4.3 will swap right over. I will have more updates as they come.