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aprox 122,000 miles but the engine has been rebuilt...dont know when...
i suspect this cause the block numbers match but it has 305 heads on it and runs awesome...smooth, no unwanted sounds and dosnt smoke or use oil...
i think some idiot said "this chain and gear dont look too bad, think i'll reuse them" :rolleyes:
More likely it's your harmonic balancer coming apart, but you might as well replace your timing chain and water pump while you're at it. A double roller chain will probably not fit in your engine, but you can always buy it and see, then return it if it doesn't fit.
A double roller timing chain fit on my dad's 80 L48 with no problem.