The motor is in a two ton 6400 stake truck, as far as I know it is the original motor and it hasn’t been rebuilt but I don’t know much about the history of it. It has 98,000 miles so I wouldn’t be surprised if it has been rebuilt. I’ll take a look at the valves and pushrods tonight after work. I haven’t heard of that cam gear issue before, definitely something I’ll look into. Thanks for the info!