Lonnir

114,000 original paint and interior

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?

😳

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

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

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

1969 LeMans with a 455, 526 hp had it three years love my poncho

On 8/6/2018 at 6:54 PM, Gregg Rossman said:

1967 firebird 400 four speed. This car was on its way to the scrap yard when I found it.  It  was restored over a six year period.  Bringing back Pontiac one basket case at a time. 

That's beautiful

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

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

The stamped number on passenger side front of tube is cc a 0326b2 wonder if someone could give me any info on this rear end