Carbking, being technologically challenged I should have said 18" of vacuum. I was trying to write down his advice and hold a cell phone so I am sure I missed a lot of what he said. He was very accommodating since I purchased the Hei from him 10 years ago and he could me have sold me some unneeded parts. He even gave a cross-reference number for the vacuum advance that could be bought locally or from Amazon. BTW he sells the part.
