283 Engine block ID

[Frank K.]

Can anyone help me I.D. the engine block #s on the pad for a 283 , right side front. The #s read CEN72 611.

[Mike M.]

Re: 283 Engine block ID

not a GM machine assembly data stamping. more than likely a machine shop decked the block and then stamped the machine shops tracking data. mike

[Dan A.]

Re: 283 Engine block ID

Photos are worth thousands of words.

As mike says the stamp you cite is not a typical GM assembly data stamping. Unless it is a partial stamp from a service replacement block of the late 60's. Those began with the prefix CE followed by year and sequential number which repeated. I doubt they did enough runs to reach the letter N. So a photo would reduce the number of questions that arise from your post.

Casting number and casting date are also essential in order to offer any reasonable opinion.

blockinfo.jpg

[Frank K.]

Re: 283 Engine block ID

Thanks for getting back to me. Will follow up with some photos

[Frank K.]

Re: 283 Engine block ID

Here is a photo of the right front engine pad stamping20200708_150203 (1).jpg

[Frank K.]

Re: 283 Engine block ID

Here is a photo of the build date and casting #20200708_161853.jpg20200708_153942 (1).jpg

[Perry M.]

Re: 283 Engine block ID

That's not a 57 block. Does it have the 3 bolt holes on each side for a provision to attach an engine mount? My fault. I thought he was asking if the block was a 57 283.

[Patrick B.]

[Dan A.]

Re: 283 Engine block ID

The 39595xx series of block castings numbers were replacements for small journal discontinued 283 and 327 blocks. In late 68 early 69 when small journal blocks were no longer available the CE program started. Replacement engines and blocks before 68 would use current production engines or blocks. GM recast the blocks with new casting numbers to service the small journal requirements i.e.
3959532 283 PASS/TRUCK CE
3959534 283 Chevy II/NOVA CE
3959512 327 PASS/TRUCK CE
3959538 327 Chevy II/NOVA CE


I've seen a 2959352 in a 1969 C series truck which is an area I have no knowledge of. To confuse the issue the truck's VIN started CE . But the block was a 3959532 stamped CE. I'm inclined to think it was a replacement engine or block.

1969 C30 cast #3959532.jpg

1969 C30 cast #3959532-stamp.jpg

1969 C30 cast #3959532-VIN tag.jpg

[Frank K.]

Re: 283 Engine block ID

Thank you all for the info. I feel better knowing that it's a replacement block rather than an engine out of another vehicle.

[Tom B.]

Re: 283 Engine block ID

On that truck vin plate, the C is 2 wheel drive (K = 4wd) The E is V8. The 3 is one ton and the 39 is model type. And that Z is for the Fremont California assembly plant.