I recently picked up three 6400's (1955 2nd Series, 1957 and a 1959). The 55 has a 235 and the 57 & 59 both have 261's. The later also have dump beds with 2 spd rear axles. I intend to do some of the same things as your father and son project (of course this will be a grandfather, son and grandson project). Each of them need extensive work on the cab, so we will be choosing which two will serve a foundations and which one will serve as parts. At least one of the two will retain the 235/261 , but one of them will end up getting a complete remake with a more modern engine, drivetrain and suspension. I have bought a collection of stovebolt engine parts over the past few weeks and one of the 261's will end up in a special project that will be hauled around by one of the trucks (most likely the one running the 261). Our project will start as soon as my new shop is up (and the wife's new bedroom bathroom project is complete...). Can't wait to get started on my own, so I will have to keep an eye on yours until then.
Regards,
Rodney in NC
