So I replaced my heater core after not having much heat. It looked like it had a leak. But when the oil cooler went out it filled it with oil and it felt like a pound and half in my hand. Now I have heat in the cab. But while looking into this is I'm buying an 085 ats but have a chance to buy an 088 also. Is the 088 better? The 085 needs to be rebuilt also and I can get it for 350 with everything.