Glen, just fired up a 390 in a T bird that was sitting for 19 years, runs tops. fired my brothers flathead that sat 25 years no problem and his 56 fairlane with a Y sat in a barn for 17 years and fired right up. my 59 P400 sat for over 10 years at least, fired right up.
The one thing I learned about fords, no matter how long they sat, if you can get them to turn they will fire up, you just may have to clean the points a couple times if they are too green.

55 Vicky & customline
58 Rack Dump, 55 F350 yard truck, 57 F100
59 & 61 P 400's, 58 F100 custom cab, 69 F100, 79 F150, 82 F600 ramp truck, 90 mustang conv 7 up, 94 Mustang, Should I continue?