[STEVE O]

I think the most important things have been brought up. I agree with several that the mid sixties was probably the closest to meeting the expectations of driving constantly with a load at 70 MPH and be able to handle it , stop it and have good heat and defrosters. There is always excepts but for the most part the mid 70s things go messed up with emissions. As far as being able to work on them the early ones are lots easier, but as stated before some of the new models are not unheard of hitting 300k with no major problems. I think you may have sold the most ideal truck for what you want. Just my 2 cents!