Update! Just got home from a local swapmeet where i scored a set of Hedman longtubes designed for 67-91 C10,s Part number 69088. Mocked them up to my engine and they fit like a glove! I am still going to make a little notch in my frame for the number 3 tube on each side as there is only about an 1/8" of clearance but other than that I will not have to do anything else!
Thanks for all the help,
Sam