Spark plugs/leads 4 gas

Hi everyone, new here but plan to visit often. I personally own a '92 75 series ute with a 1HZ and huge after market turbo which punches out a massive amount of torque. My question though, is in regards to the family wagon. We have an '80 series that runs predominately on gas (actually, at the moment that's all it will run on). I am on a mission to get the car running like a dream. Firstly, I am replacing the fuel filter to eliminate that possibly being the fuel problem, before removing the injectors to have them reco'd. The new wife (her car) 'never' ran it on petrol. 2nd can anyone tell me, remembering it runs predominately on gas, what is the best plugs/leads.cap etc money can buy for said wagon.

"Nothing changes if nothing changes"