All '53 and up 235's have the same cylinder head. Dipper or pressure, doesn't matter. Look at a Hollander interchange manual. The '53 stick and truck 235 engines are unique in that they were the only ones (made in USA) that had the newer top end, but retained the babbit pounding lower end. Some goofy combo's were made in Canada over the years, like a short pushrod cover 216, but I don't really have any info on these engines.