Well, we will find out tomorrow, how bad it is. It has a mild cam, long tube headers, & FlowmastersMy Falcon is running 4.11 gears with a 302. I have driven it on trips of 50 miles each way. Sucked the gas up and drove me nuts with flowmasters. I installed a AOD trans and went with Magnaflow mufflers.Long trips are do able now. Still not great gas milage ,but that has alot to do with the big cam and racing carb. It still is much better now.
Some general advice for more than the original poster:Got a 289 running C-4 & 4;11 rear gears. At 65mph it's turning about 3000 rpm. Anything wrong with long trips at that kind of rpm? I know it will burn lots of gas. LOL