Boss,
Stick with the original engine....it is rugged engine and performs well on original specs plus its a 5 speed also.
these cars are old now and charade has a problem with front suspension u can say because its MUKKI tends to get softer creating the problem of miss alignment of tyres as well as axle worn out.
for alteration ur budget will be high, u have to alter all the foundations, match the axles, gearbox etc etc and u wont have piece of mind in my opinion. if u are a car guy and knows all the gimmicks of car handling then go for it.
otherwise, Overhaul the engine completely, redo the suspension. put some proper tyres as specified by the company and enjoy.