Yenko tach's

[apratt28]

Please forgive me if this is not where I'm supposed to post this as I'm new here.
We have YS-8043 which does not have a tach or the 3 gauge package in it, I'm wondering if any came with out those options or if it was standard Yenko equipment. I know that it would of been mounted to the upper part of the dash but this car does not have any holes up there which could be from never installed or the dash has been replaced at some time. Any help with this would be great as i don't want to drill any unnecessary holes if they don't belong
Thank you for your help