Sorry i couldnt get back to answer everyones ??'s,i went to check out my bro-in laws charger he got back from paint, Im a 100% its an 8 3/4,its a 489 case,has front pumpkin, no rear plate/cover,i dont think i got too burned,i only paid 600 bucks for whole car extra windows,new rear seats,running 318/360 top end, 904 combo,brand new edelbrock 600 n bunch other stuff,so i didnt get to burned on the deal,i just had to put the car together,and yes i measured right,axle ends are quite large,and have both the chivo ,and mopar bolt patterns,but right now have no way to post a pic,maybe tomorrow i can. also on a lift and putting the car in drive,or in any forward gear both wheels spin in same direction,just only one spins on the street when i smash out,could it be 318 doesnt have the balls to spin both,or is this what u were referring to jasonm? thanks sorry for long post..