68 Roadrunner question

68 RR had 383 or Hemi, 383 should have the 8.75, Hemi the Dana, my 383 RR has the 4-speed with the HD hemi springs. That said i have heard reports that a few auto hemis very early ones may have slipped through with 8.75's, and maybe a 383 or two with 4 speeds had danas, Most important is the VIN and tag if its a J than its a hemi car, then you could see if there is a stamp in the axle tube showing the date of the dana. heres a pic of my 68RR 383, hurst equipped 4-speed, p/s, power disc brakes, factory tach, wide sill moldings, decor package, wood grain wheel,