Now that I have finished the cd14, my first fix it project done with your help, I have found a Johnson7.5hp, 1956 ? I think , but am having a terrible time finding a pressure tank for it. Had an add in craigslist and have had several calls saying that they have a tank. Problem is that the tanks must be gold lined having prices from $50 to $100 . Can someone assist with information about conversion to a single line, the cost and difficulty of doing the conversion to a pulse type system.