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I measured my timing chain deflection on my 302 - out of a 71 bronco. Currently 7/16th of an inch. My haynes manual stated that maximum deflection is 1/2 of an inch.
If your engine is already taken apart go ahead and replace it.
A new chain is only a few bucks and is cheap insurance against potential problems down the road.
Rezvani's Latest Post-Apocalyptic Monster Is a Ford F-150 Raptor Underneath
Slideshow: Called the Fortress, the 850-horsepower pickup combines Raptor underpinnings with military-inspired features, survival equipment, and a starting price of $285,000.