Tom,
It is indeed very difficult, but it can be done. You need to aim the timing light at the pointer through all the 'stuff.' The trick, at least for me, is to NOT look for the pointer in the same line as the timing light. The engine compartment should be in your garage or car port, not in sunlight. It also helps to have a bright timing light.

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Glen Tokuhara
Beauty & the Beast and the wagon that could!