Need help

[Lonnir]

I have  rear end with numbers cca0326B2 was wondering if someone could give me any info on it thanks all

[Frosty]

Still working on the "CCA" portion.

 

0326B2 means it was built on March 26, 1969 (03-26), Buffalo plant, 2nd shift (B-2)

[Lonnir]

I can't find anything with the C C A on it. Also would like to find out about a block I have, numbers are C086284 YC, 21c304499,485428

[Frosty]

Casting code 485428 means you have a 455 engine block made between 71-74, either a two or four barrel carb. YC means it was an automatic car. The date the block was made is by the distributor hole. Where were these other numbers?

[Lonnir]

The other number came from the passenger side tube of rear end CCA0326B2

The numbers by distributor are 71, 7D, N,L090. Casting number 485428

[Frosty]

L090 = December 9, 1970 was when the block was made. So this block was made for the 1971 model year.

[Lonnir]

1 hour ago, Frosty said:

L090 = December 9, 1970 was when the block was made. So this block was made for the 1971 model year.

Thanks for info . Now got to figure out the ratio in my rear end so I can order a cam

[Frosty]

That’s easy to approximate Jack up the rear end properly. Put the car in neutral. Rotate a rear tire once. Count the number of revolutions of the driveshaft it takes to turn the tire. A little over three is a 3.07, three and a half should be a 3.55, three and a third is a 3.73, almost four is 3.90, just over four should be a 4.11. Just shy of three and a half is a 3:42. I recommend using a chalk mark on the the transmission tail housing and the u-joint, as well as the tire to the bottom of the fender.

Edited August 10, 2018 by Frosty

[Lonnir]

😳

2 hours ago, Lonnir said:

Thanks for info . Now got to figure out the ratio in my rear end so I can order a cam

 

1 hour ago, Frosty said:

That’s easy to approximate Jack up the rear end properly. Put the car in neutral. Rotate a rear tire once. Count the number of revolutions of the driveshaft it takes to turn the tire. A little over three is a 3.07, three and a half should be a 3.55, three and a third is a 3.73, almost four is 3.90, just over four should be a 4.11. Just shy of three and a half is a 3:42. I recommend using a chalk mark on the the transmission tail housing and the u-joint, as well as the tire to the bottom of the fender.

Ok I'll try that. Didn't think about doing that

[Lonnir]

4 hours ago, Frosty said:

That’s easy to approximate Jack up the rear end properly. Put the car in neutral. Rotate a rear tire once. Count the number of revolutions of the driveshaft it takes to turn the tire. A little over three is a 3.07, three and a half should be a 3.55, three and a third is a 3.73, almost four is 3.90, just over four should be a 4.11. Just shy of three and a half is a 3:42. I recommend using a chalk mark on the the transmission tail housing and the u-joint, as well as the tire to the bottom of the fender.

Ok did the tire thing it's a 3.90 

My passenger tire did not turn my drive shaft is this normal?

[Frosty]

You probably don’t have positraction.

[JUSTA6]

21 hours ago, Frosty said:

You probably don’t have positraction.

If ya do...it's broke.