Time to Inframe?

[Chamberpains]

Some trucks, the cam can be slid out the back through the dog box in to the cab.

Detroit (60 series) made a cam that you can literally pick straight up off the head. I dont know why other engine manufacturers don't design them this way. You have to get to the top of the engine to adjust valves so access should always be there. Even in marine and generator applications.... IDK. I wouldn't think it would be a trademark issue.

JimT more than likely your whole front end will or should have to come off to get it out. To replace a cam you are literally half way to fully doing and in frame. All thats left is to unbolt the head, drop the oil pan and pull piston packs. Granted thats the most expensive parts but labor is half the cost of the job.