The lower chain rails get a lot of oil so wear really isn't a problem. The upper guides have more wear and the drivers side inner guide gets brittle and breaks when the chain flops around. Then the real problems begin. So, take your cam covers off, rotate the engine to TDC 1 so the cam marks are aligned with the notches on the cam tower and read the offset on the harmonic balancer.

__________________
Regards

Warren

Currently 1965 220Sb, 2002 FORD Crown Vic Police Interceptor

Had 1965 220SEb, 1967 230S, 280SE 4.5, 300SE (W126), 420SEL

ENTER > = (HP RPN)

Not part of the in-crowd since 1952.