There are two ways to link the timing chain together on a roll-in replacement, with a c-clip or a pressed link. Look closely at the chain for a c-clip, if you find one you know the chain was replaced. A proper crimp would be hard to find even if the chain was replaced. Remove the vacuum pump as stated for inspection.

What color are the chain guides? If beer bottle brown they need to be replaced. If not then they were probably changed and the chain replaced.

Good luck...make it live again @ 200k it's not warmed up yet!!!

__________________
"Rudeness is a weak man's imitation of strength" - Eric Hoffer