I have both a NH 276 and a 277. Pickup the 276 first. It needs a little work so I picked up the 277 for parts. As it turns out I think the 277 is in better shape than the 276. Things I know...the 277 is 1970 model and the 276 is a 1972 model. The 277 has a little wider pickup. The 276 has a...