allright..congrats.. now, is the car good in drive and running? how is the acceleration/pick and stuff?are any cylinders failing(while moving,do u feel any stops?)?. if u are not having any of these problems wid 83 charade, then its very good.now to maintain ur car u'll have to take good care of the engine and the body both.take it to service area every month, change oil and air filter(if needed)after every 12000 kms. now lets come 2 the investing part.. what kind of modifications or things u want to add to ur car? rims and tires, as u said in the topic, will cost u around 35,000(good ones).for nice fuel efficiency, install new spark plugs,best would be bousch super 4, as no unburnt fuel would be wasted.