External transmission cooler probably wouldn’t be a bad idea too. I’d do it if the trailer wasn’t too heavy, as Bill said.
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71' GTO -original 400/4-speed/3.23 posi
13.95 @ 102.1 on street tires @ 4055lbs.
‘63 LeMans- ‘69 400 w/ original transaxle. 2.69 gears.
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