Landon730
Active Member
I have a 98 one ton dually (chevy) with a 350. Its a lot of truck for that motor. Basically what Im wondering is how hard would it be to convert it to a 454. Mainly the wiring harness. I know the ECMs are different but I know a guy who knows how to program them if that would be possible. And if anyone can get gas mileages for each motor that would help me a ton. Right now its a stock 350 in a Single cab 3500 dually. Im wondering what the fuel mileage for a 350 and 454 would be in this truck.