OP. your wagon is so sweet!! What kind of pulleys are you running? Stock? I tried running the 5 1/2" bottom pulley source sells, my temps would creep up on the highway.
I run a Moroso underdrive crank pulley.
'63 Dodge 330 11.19 @ 121 mph Pump gas, n/a, through the mufflers on street tires with 3.54's. 3,600 lbs. 10.01 @ 133mph with a 250 shot of nitrous an a splash of race gas. 1.36 60 ft. 3,700 lbs.