Desert Captain wrote:
depending on what years you are comparing the 450 will be 2 to 3,000# heavier and that is for every mile you drive.
{The 450 has a 4:56 rear end vs the 4:10 on the 350.}
According to Ford's website, the difference in curb weight between the E350 chassis and the E450 chassis with the same wheel base is only 206 pounds, not 3000 pounds. The E450's extra weight is in the thicker frame material, bigger brakes, thicker springs, and a few other minor influentials.
I understand the 2019 E350 and E450 have the same E450 rear end due to their limited production numbers, in place for a few years, maybe since 2017.
I agree that an E450 chassis for a 21-24 foot motor home will be just too much for the application. Like I previously mentioned, I would still go for it and plan to have a local shop change the front springs to lighter-duty E350 10050 versions, and remove one (or two) rear leaf spring per rear corner to get back to the right ride. This way you get a stronger frame for less twisting, bigger/better brakes, and more for a small investment. It's an your opportunity to get the suspension customized properly for the actual application. My 24 foot 2007 E350 11500 could use the 10050 front springs, but my front wheel alignment with offset bushings would all have to be reverted back to stock. Maybe one day I will get that done.
