rear end swap. anyone know the right size?????

[hard-charger]

hi all!  i just bought a 68 satillite w/ a nice torquey 446. it came w/ a dyno sheet that said 407hp. i forget at what rpm. but massive amouts of torque. i plan on putting on my new stealth heads, its got 10.1 comp. so i was gonna change the cam to. but im worried about the rear end being able to handle some upgrades.
from what i can see it has a 7 1/4 rear end. ive herd alot of bad things with the two together. and its also got a 2800 stall and shift kit. so im worried its gonna take a crap on me.
i was dumpster diving at the wrecking yard the other day and came across a 69 fury 4 dr, w/ a 8 3/4 489.

i was wondering if it will fit right on my new 68 satillite? or is it to wide?
and will i need a new driveshaft, or any other new parts for the swap?

if anyone can help? thanks all!

[terrible one]

I think that the C body rear will be too long in the B body, but someone correct me if I'm wrong.

[bordin34]

I don't think you could even get a 7 1/4 in anything but an A-body. I think that 68 Chargers all got 8 3/4 rears.

[terrible one]

Hehe watch it be a Dana! . . .

[no318]

8 1/4 was standard.  8 3/4 optional, standard with 383 magnum, DANA standard on 426/440 cars with 4 speed, optional on auto. 

[mikepmcs]

You might find your answers in these links.

http://www.moparts.org/Tech/Archive/axle.html

http://www.mopar1.us/875.html

http://www.mopar1.us/875rear.html

v/r
Mike

[hard-charger]

lol.......... i can rule out for sure that it isnt a 8 3/4. ill jack the car up today and see if i can get better look.
at fist i ruled it out as a 8 1/4. if it is, will it be strong enough for the proposed combo?
thanks!!!

[bordin34]

No, a 8 1/4 can only handle about 300-335hp then it will fail. The 7 1/4 can handle about 25-50hp then it will explode.

[John_Kunkel]

The 8 1/4" didn't come out until '69, a '68 Satellite could have a 7 1/4".

[RallyeMike]

The Fury rear is definitely too wide to use on that year B-body.

[bordin34]

Chart

[hard-charger]

is there any identification marks or numbers? like on my 8 3/4 rear. ther is a number and 489 stamped on the side.
is there anything like that on a dana 60 and 7 1/4? thanks again!

[bordin34]

I do not know for sure, but I believe there is a casted somewhere on the housing. Also, it should be nearly impossible to confuse the two. If the rear is small like really small it is a 7 1/4, if it is big, the rear is not a 7 1/4.

[hard-charger]

just trying to confirm what it is. i new it wasnt no dana 60. my monster truck has one. its way bigger.
its defanatly a 7 1/4. so 68 b bodys did come with them. crap. 
thanks for the help.
now i gotta go on a mission to find a b body 8 3/4 or if im super duper lucky,............. a dana 60. without selling my major organs for $.
thanks!

[bordin34]

Also, I think but I am not sure that 7 1/4 rears have tapered tubes.

[Mike DC]

 
You can't confuse an 8.75" rear with any of the other Mopar rear ends. 



It's the only banjo-style one.  Dropout front casting, and no detachable cover of any sort on the back. 

It's basically a Mopar version of the Ford 9-inch.

     

[Rayzor]

I know the 7 1/4 rears were available in 68 Chargers. My car was a slant six charger and thats what it came with.