Nice 'Scort!
If i were you i would search the classifieds to find a 2.0 or 2.1 pinto motor that has been built up, can be had quite cheaply, Budget for about 700 quid for the whole thing inc carbs (40s or 45s) and u should have a car that puts a massive smile on your face with enough torque to break the rears no probs
I like the Colour of yours - Sweet