You mentioned that it has a 3:23 rear. If this is a factory 4-speed car, it came with a 3:54 Dana rear, but then again, your car might have been upgraded to the 4-speed. Just thought that I'd add this.
I know that There's a hemi and 354 dana in the avatar pic of mine. 67 R/T
Per the fendertag, the car started out red with black interior,column automatic. Now still black interior but 4 speed and 06 hemi orange color. will deal on 72-74 Barracuda, 71 Demon, 68 R/T, 69 Super Bee...70 Roadrunner, 70 GTX
