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Everything is easily available. They are easy to work on with a few service tools. Few things you really need to know before working on certain parts so never just dive in if you don't know. I forget what year they changed the timing but I think 67 you need the degree wheel to time it, later models have 2 holes drilled in the crank. TDC and fully adv. firing position. The latter are simple to time the former are not bad just more steps. Valves are easy on those too. There are no valve seals and watch where the other seals are made there are some cheap junky ones out there. Lucas also makes a new ignition plate that is much better than the original. They also make a Typanium unit that looks like the Zener heat sink and mounts in it's place.