I have an Oliver Hart Parr 70 that has been stored in a dry barn for over 15 years. Last year when I tried to turn the engine over it was stuck.(I drove it in the barn 15 years ago, ran fine) Filled the cylinders with ATF/Acetone and today I got back to looking at it and the front five cylinders are void of any fluid, (Leaked though into the pan with no rust visible when viewed through a bore scope)The back cylinder is still full of ATF. I plan on selling it and my question is should I put the time,money and effort into it and pull the head to see if we can get number 6 unseized? The block has been welded (never leaked after repair)as well as the front axle casting. All 4 tires were flat but they now all hold air except for 1 calcium filled rear one which the valve stem is corroded has well as the rim where the stem comes out. Not looking for a lot of money out of the sale of it. I don't think I could recoup the cost of the valve grind gasket kit just to sell it unseized. That being said , should I sell it the way it sits or pull the head and try to get it unseized. Thanks,Bill M.