Regular maintenance just basically involves oil changes on the motor and the trans. The only time we change spark plugs is if we make a pulley change, then we go one step colder on the plugs.
The valvetrain consists of a Custom hydraulic roller cam, one a kind custom lifters, Manley pushrods, Custom built valve springs, titanium retainers and keepers, Manley valves and Jesel rockers. There is no setting valves since it is a hydraulic roller, so it very maintenance free for at least 100 hrs. The lifters are the key. We had no luck with any lifter off the shelf, so we had a set built that would work.