Personally, i would find a abd lump (1391 cc) fit a 1.3 aav head to it, throw in a 264/268 camshaft, 4/2/1 manifold, upgrade to g40/3f exhaust system.
Keeping it budget with adding a nz multipoint injection.
try to find a 8p gearbox.
but the 3f/75bhp engine is a plug and play swap with your engine..