The easiest to work on for me would have to be my old Chevy pickup with the 327. There was almost enough room to climb into the engine compartment and stand to either side of it! I love changing the points and condenser, it was a snap to set the dwell with a meter and the right allen wrench. Plugs couldn't have been easier to swap out, so much room! The Carter AFB never needed adjustment, it was like the Eveready Bunny!