8 1/4 rear

[Markzilla88]

Hey guys

so I currently have a 1973 dodge charger with a 318, a904, and an 8 1/4 rear with 2.70 something gears. Its a slug.

Im a college student with a pretty limited income, so this restoration is coming together slowly.

I have a 360, stock stroke, new pistons to put me around 10:1, stock heads, comp cams xe268H, headers, edelbrock intake, edelbrock 600 cfm carb, and the rest is stock. All just waiting to be built during the summer. A buddy of mine did his calculations and came up with around 375 hp and 400 lb/ft torque.

first off I wanted to hear some opinions on tranys. Is it worth it to look into a 727 to save myself the headache of balancing a 904, and do you guys think the 904 will last?

Now for the rear end. Will an 8 1/4 last or will it just get torn apart? I want to put 3.55 gears in to wake it up some, but I dont want to go wasting my money on gears that might get torn up with the rear end.

Any input is greatly appreciated

Thanks!

 

[1toolguy]

Unless you planning on running slicks if you build the tranny and rear end right they should hold up just fine. I'm making similar HP and torque numbers from my 360 and the 904 and 8 1/4 rear end (wth 3.55s) have both held up fine for the last 4 years, which has included about 100 passes down the 1/4 mile at Bradenton.

 

[72Satellite440]

Many sites have said the 8 1/4 is good for 500 ish hp
Soo should be ok for you..

Some would say use the 904 until it wears down completly or breaks but if its me above that tranny I want to make sure its not going to break

 

[blackblazer717]

Agree. Beef up what you have. abd drive it til it breaks. With a mild small block i cant see you destroying too much.
As for the 8 1/4" i wish someone would make a spool for it....

 

[Ron 73]

You can get a limited slip for the 8 1/4 Threw Auburn, ill leave the link if your interested...

http://www.differentials.com/products/differentials/limited-slip-differentials..
You can call there toll free number to ask them, I have no idea about a lower gear, but i know they do carry the Auburn limited slip for the 8 1/4....