I have a 1978 Toyota

I have a 1978 toyota hi lux with a 20r engine. I'm looking at lowering if and i need some info. If anyone has done this or knows anyone who has done this. Basciclly what i want to know is what is the biggest rims and tires i can put on it.

basically it depends on your location, each will have its own set of guidelines for this kinda thing, as will the manufacturer you should be able to get the ino of the car makers website