question lang. sa utol ko ito (hindi ito sa akin....)
car is Mazda Familia 96 GLXi.

the car kasi excessively emits black smoke. Tapos parang wala na syang power in acceleration. In fact, parang namamatay yung engine at 2nd gear pag umaahon sa humps.

i am not knowledgable in engines (suspension is my forte...hehehe).
ano ba kailangan dito? top overhaul lang o total overhaul? i've texted Manny (of Cruven) yesterday to inquire about top overhaul. Nasa 5k lang ang expense and one day to complete. Pag total overhaul ba magkano? Tsaka gano kahabang babanatan?

would it be worth it yung total overhaul? or an engine swap will be more cost effective?