What year is the 340 you are using? 68/69 will have the timing marks on the same side as your 273. If you are using a later model engine, the 273 water pump makes it difficult to read the timing marks.
What year is the 340 you are using? 68/69 will have the timing marks on the same side as your 273. If you are using a later model engine, the 273 water pump makes it difficult to read the timing marks.
