It's all about personal choice.
I'd get the car running 100% first, get the windows tinted, and then upgrade the stockers steering wheel. Then depending on how much I liked the car, and how long I was going to keep it for would determine my next set of mods. But that is what I would personally do. If I really wanted a different car, I'd be saving my pennies up to get that, and using this as a cheap getaround.
'67 Mustang V8 4sp... what fun to drive!