well, i only have one simple question about carb.

if i am going to replace an old carb with a new one of different model, how would i know if it will fit and work properly on the engine?

we have this old owner type jeep with a 4K engine. mejo palyado kasi matagal ndi napatakbo. so far umaandar siya pero after overhauling the carb, palyado pa din. i am thinking of looking for a surplus carb to replace the old one.