Radiator hose.

Slant 6 are different than V8s

V8s (small blocks)

Upper hose enters from passenger side (all years IIRC)

pre 70 the water pump exits on the drivers side (timing mark is visible from the passenger side) cast iron water pump, different timing cover, bolt on timing mark (except 69 where it is integrated but on the pass side), different accessory brackets than 70 up

70 up the water pump exits on the passenger side (timing mark is visible on the drivers side) Aluminum water pump, different timing cover, integrated timing mark, different accessory brackets than pre 70

69 down cast iron water pump
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70 up AL water pump
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69 Timing cover
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68 down with bolt on pass side timing mark
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70 up timing cover
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65 V8
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67 - 69 V8
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70 up V8
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