I have a 70 intake for sale. I need to find it and check date. I am going to GS NAts. Maybe we will be lucky on date?
My original intake is E5, unfortunately I modified when I was running the stock appearing classes and ultimately what turned into the FAST class. So, ideally I would find another, not urgent but would be nice. My car is 05D or 4th week of May. PS thanks for checking your stock Dave!
Here are date codes the 70 Buick 455 manifolds I have left: F23 = June 23 1970 M8 = December 8, 1969 E28 = May 28, 1970
I can get some pics maybe over the weekend. I did not remove these so I cannot speak to the threading question.