My recently purchased 62 inline 6 started blowing white smoke which was new so I took to her to my mechanic. The report stated the engine vacuum was 12-16 in at idle fluctuating indicating a valve train malfunction. Excessive blow by measured at dipstick. Engine burns significant oil. A rebuild was recommended and I made an appointment at a local classic ford shop here in Oakland ca. I was quoted 2800 but I know that number will go up with the addition of a radiator and other odds and ends. Just wanted to know if this all sounds reasonable? The reason for the rebuild and the price. Thanks.