Last 10% takes 50% of the time

I took apart a perfectly good 68 mustang, it was a snowball kind of thing, pull engine to rebuild it, while there, detail the engine campartment, next thing you know every part is off and in a storage unit 5 years later at 100.00 per month I cut the body into 4 chunks, bri g them to a scrapper and sell all the parts at a automotive swap meet