Keep it! Either 4V swap or build the broke motor. either is cheaper than a new ride.
Treat yourself to something newer. As long as you are moving up to a nicer mustang you won't regret it.
KEEP IT !!!!!!!!!
I'm 55 years old and would give the world to have my 1957 2 door Chevy wagon back with it's .030 327, dual quads, 4 speed and 5.13 rear end Same with my first new car a 1978 4 speed Z28. or even my 69 350 4speed Nova.
If you keep it you'll be glad you did. even if it's broke, park it and get back to it later. BTW when you get married don't buy that It's me or the car crap, dump the chick and keep the car, babes are a dime -a- dozen if you're not a jerk.
Good luck and BTW keep the Drifts on it
And the girl I have is far from dime a dozen but she puts up with my car stuff lol