Man, I thought this would be easy! Chryco, I think you're right that the 70's might be different from the 71- 74's (at least it looks that way from the pictures).
Sixpackcuda, I would love to take you up on your offer. We should definately be able to get your knobs back to you by the end of September. I'll send you an email with my address. Thanks a bunch!!
If anyone has one from a 70 we can use as a template, please let me know. Thanks!!