firewall help needed

[kasearch@ix.netcom.com]

I need some help getting the extra hole filled in on my firewall but am not sure as to which are extra, and which belong. Car is a 69 fastback GT500, Dearborn built (6/13), A/T, A/C, P/S.  Can any of you tell me which holes were added, and that I need to fill in?  The car is at the body shop now and they are getting ready to begin work