What was the length of your old seat that was in the truck originally? Another thing I was considering was bolting or welding the seat brakets from the '55 to the seat frame of the dodge if the dodge bench seat will fit. This way, I will not have to drill new holes in the bottom of the cab. I know it is not too tall, but I am not sure if it's too long. The seat I plan on installing from the donor truck will be 60", or 5 feet, exactly in length. You said in your post the replacement ford seats were 57" long, correct? Do you think it would have three inches to spare?