I have a buddy of mine who built my AA 707-123CC and you would not believe how some of the parts and configs changed from airline to airline. The throttle quad on the 707 was litterally slapped together vs the 727 which had more of a structure.  The 707 cockpit parts I have came from a 123CC and that airplane only had 2 turbo compressors vs the usual 3.  Some versions of the 707/727 had red firebottle handles on the center part of the glaresheild and some have them on the overhead.  My buddy has a 707-331B cockpit and that is one thing I noticed about the red emergency airbrake handle being on the left side of the MIP....our cockpits are very different indeed!   :)