Old car projects can take longer than you think. They may well cost more money than you've budgeted. You could certainly have some big challenges along the way, in terms of mistakes made, parts not fitting properly, must-have components on backorder, and having to acquire some items that might not be reproduced. The missing parts could well be unobtainium. In the end, you may need to make some parts yourself. In essence, restoring an old car is not the sort of hobby that's well suited for those who aren't willing to overcome many obstacles along the way. The terms labor of love and labor of lunacy come to mind.