Experts may weigh in, but the Rupert Ratio book says in bold:
"If the V is present it must be used in preference to the dash"
So that's what I did.
Does it say why the V is used in preference? it doesn't show as a "Must" on the image, just "V timing marks used in prefrence to other timing marks".. Just thinking that there must be a good reason why there are 2x timing marks and not just one?
Allan, Rupert's goes on to explain the issue.......in pretty good detail. Basically claiming that the "V" is the newer of the marks and should be used if present. States that the 'V"'s location can vary? Then gives you a way to check them. Very helpful.
I just checked my paper copy of the Workshop Manual and my copy doesn't mention the "V" either. My guess is there's a Service Bulletin out there somewhere?
Just another reason to get a Rupert's.........worth every dime you pay for it.