Hi Ben,
*this car was originally white with a black interior.
*under normal circumstances, the 4 speed transmission will have the FORD (not Shelby) VIN stamped. Ask the seller to send you a picture to verify the VIN is there and that it is truly the original tranny.
*Ford made a habit of stamping the "K" code 289s with the VIN of the car. However, in 1967 the big block 428s were not stamped with a VIN. The best you can do is locate the date codes and part numbers from the block, heads, carbs etc and see if they line up with the date the car was assembled at Ford. Hopefully the dates on the engine parts are a few weeks earlier than the Ford assembly date for the car.
These are some things that I would consider when shopping for a Shelby. 1) a color-change of the body is very expensive to put back to original. Door jambs, the trunk area etc, etc all need to be stripped and painted back to original. If you love the new color and plan to own the car for years and years, this is not a big hurdle. Just be aware when you go to sell later on, this likely will hurt the value and make it harder to sell 2) it is not that difficult or expensive to change the interior color relative to changing the color of the body. I know from your earlier post your heart is set on a car with a parchment/white interior. If you were to find a fabulous car for the right money but the interior is black, it would not be a massive undertaking to convert to white/parchment knowing you may want to convert back to black in the future at sale time. Ideally, i would stay patient, enjoy the hunt and see if you can find a car with a "U" in the Shelby VIN denoting a parchment interior.
If you do get serious about #932, Jeff Speegle who frequents this site and is one of the SAAC judges would be a good person to contact to come look at the car with you as he is in NorCal. I looked at a car with him in SF and his knowledge and extra pair of eyes were super helpful.
Jeff
From the 2011 edition of the Shelby registry --
0932 GT500 Completed 4/6/67 and shipped 7/12/67 to Holiday Ford (Sunnyvale, CA). Purchased 10/10/67 by original owner Paul Webb (Santa Clara, CA). Warranty work performed 11/67 to fix the ratio dial light. Also previously owned by Verne Howell (Portland, OR), Bernard Mark (Oregon City, OR), Roy B. Schaefer (Port Orchard, WA), Dennis Karras (Olympia, WA) ?-'09. The color has been changed to dark blue with LeMans stripes. Interior has be changed from black to Parchment. Presently owned by Ray Jarris Jr (Seattle, WA) who purchased it from Karras in '09.