8 1/4 posi???

[original72]

just got the car running a few months ago after it was sitting over 20 years..... got it tuned and in the parking lot so figured... lets give it a lil gas..... its a 72 SE originally 400 2 barrel..... pretty sure only a 8 1/4...... but anyway... as i gave it gas and the tires broke loose.... it left marks from both instead of just one..... now my question is did they make 8 1/4 posi's? found a tag on the outside cover and the gears are 2.71's

thanks for the replies in advance
Bill

[74Charger]

I have a 74' Charger SE also.  And mine has the exact same engine rearend combo with a suregrip.  I am getting ready to swap it out for a 8 3/4".   I already have the housing out of a 72' Roadrunner.  Just need all the rest.  Should be a pretty easy swap.  I HOPE!!

[RallyeMike]

did they make 8 1/4 posi's

No. But they made 8-1/4 sure grips!   

Should be a pretty easy swap.   I HOPE!!

If I remember right, the centering pin for the perches to sit on the leafs is a larger diameter in the 73-74 cars. If so, swap in the 72 RR springs or hog out the holes in the 72 8-3/4 perches to fit. Everything else slides right in.

[Chryco Psycho]

the shoe is bigger on the 73-74 cars due to the added rubber isolator , the older diff will bolt right in without the isolators & Use ne U bolts K