Welcome Mark,
Glad to have you and you father aboard. Very nice convertible. Midnight Blue with a white top is a great color combo.
Almost all '65 steering wheels are cracked. They can be professionally restored for big bucks. Or there is a guy (Frank) who reproduced the '65 Skylark steering wheel a couple years back. I don't know if he has any more left. Anyone know how to contact him? The dash pad can also be restored or look for another that's not cracked. It can be dyed to match most interior colors. The pitting in the taillights is typical. They can be rechromed for big bucks or you can search for one that is not so pitted. The Skylark Gran Sport taillights, dash pad and steering wheel are the same as what was used on standard Skylarks.
Regarding the VIN and serial number, besides the VIN tag in the driver's door jamb, the serial number should also be stamped on the front on the engine block on the drivers side. On the passenger's side of the engine block should be stamped LR plus three digits. The VIN should be stamped on the frame in two different locations, as you know, Frame rail top side under driver's door. It's is virtually impossible to see it without taking the body off the frame. My mentor Loren, must be losing it. The other VIN should be stamped on the TOP of the frame rail, driver's side trunk extension portion. If the frame does not have a lot of rust, you can read it using a mirror. You might need to scotch brite it to make it easier to read. Correct Loren? However, on the outboard side of that trunk frame extension will be the frame's part number. There were two suppliers of the boxed GS frame. It should be either #9777400 or 9780911.
Can you share what numbers you found in those locations? The number on the top frame rail should be correct for the car. It will tell you whether the engine was swapped or if a new VIN was assigned to it by Department of Motor Vehicles. Also, can you share the data on the firewall trim tag. Again welcome and congratulations to your dad for buying such a desirable musclecar classic.
John Egel