I'm installing a TH-350 in an old Chevy 1/2 ton pickup that doesn't have a trans cooler in the radiator. What are your thoughts on using only an auxiliary cooler, like a Hayden 678? I live in north Texas where we don't see a lot of really cold weather, so I don't think I need to worry about getting the trans fluid up to temp. But I do want to keep it below 200F on 100 degree days. I doubt I'll ever pull a trailer or haul more than 1000 lbs.