Dash Guru's - Update/Backdate

[vol96]

I have 73 E with cracked dash. Trying to figure out what other years will fit. I read somewhere that 65-77 are interchangeable.

However I've seen some, and this is true with mine, that dont have speaker grill vinyl (my speaker grill is a separate metal piece). But I have seen more that do have the vinyl grill. Is one style aftermarket?

Is the speaker grill different depending on whether or not there is an a/c vent? Dont see why this would be, but cant figure out any explanation.

Thanks,
Joe