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Hi kdenault--Towed our 1973 27' Overlander with a wet weight of 6200 lbs with several Chevy G20 3/4 ton vans with 5.7 ltr, and 3.73 rear with great success. I always tow in "D" which is 3rd gear and a 1:1 ratio, rather than in "O" which is 4th gear and a .7:1 ratio. Currently have a 2001 Suburban with a 5.3 ltr, and a 4.10 rear, as kids are gone, so I don't need as much inside room. Would not hesitate to go back to a van for towing. 4.10 rear yields better towing performance with about the same fuel usage as the 3.73.--Frank S
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