new rear end

[sleepertruck72]

I have a 72 c20 with a new 330 hp 350 ci crate motor. Holley 600 700r4 and I have a Dana 60 with 4.10 gears. How hard would it be to get a rear end from a newer 2500HD to bolt up to the frame and be able to have rear disk brakes ? Or should I just keep the one I got ? I use the truck mostly for work. I do tile work and general construction so I do carry alot of weight usually. Would 3.73 gears be better or worse ? Thanks !!!

[greasy68]

3.73 gears would probably make it a litlle more daily driver friendly. It would probably be pretty hairy to swap a new HD rear end in. It would probably be easier/cheaper to just buy one of the rear disc kits from a site vendor.

[69halfton]

if your pulling alot of weight around, and your not doing a whole lot of freeway driving, you'l really miss your 4.10 gears.

they make a world of difference in terms of low end torque.

what a nice job getting to drive around in a c20 ...are you hiring?

[chrislehr]

Someone in here must know - 1970 Custom 10 - what rear end is this?

[chrislehr]

trying to match using:
http://www.drivetrain.com/gmdanadiffgaskets.jpg

[crazy longhorn]

Originally Posted by chrislehr

trying to match using:
http://www.drivetrain.com/gmdanadiffgaskets.jpg

8.875 /12 bolt......the gasket is turned 90degrees on the chart....

[crazy longhorn]

Originally Posted by 69halfton

if your pulling alot of weight around, and your not doing a whole lot of freeway driving, you'l really miss your 4.10 gears.

they make a world of difference in terms of low end torque.

what a nice job getting to drive around in a c20 ...are you hiring?

I agree, if you are runnin a 700 r4, I would leave that big dana in there. Even on the highwy, she will run easy with that .7 OD. Thats a good stout diff, just go aftermarket on the disc brakes ,& keep a big smile on your face crazyL

[chrislehr]

Originally Posted by crazy longhorn

8.875 /12 bolt......the gasket is turned 90degrees on the chart....

Hence my confusion.

Thanks.

What gear ratio is stock on those?

[crazy longhorn]

Originally Posted by chrislehr

Hence my confusion.

Thanks.

What gear ratio is stock on those?

If its a V8 /auto, figuer 3.07 ratio....6 /stick , 3.73 is most common...

[sleepertruck72]

Thanks alot this site is really helpful for people like me

[chrislehr]

Originally Posted by crazy longhorn

If its a V8 /auto, figuer 3.07 ratio....6 /stick , 3.73 is most common...

Yep, V8 auto... and dont laugh, im a RWD n00b (last project was a 2003 WRX) but people go for a higher ratio for more top end, right?