[jwcfbd]

Hey guys. I need a little help with this one. If I remember correctly it was pulled out of a 74-76 Bonneville and was suppose to be a 455. When I got there I saw it stamped with 400 so hard telling what it really is. I bought it about 12 years ago and just never did anything with it. I still don't have the money to build it but I am going to get it cleaned up and inspected to see if it's worth saving any longer.
I tried to find the info about this block but I'm still not sure what I have.
Thanks

[jwcfbd]

It's a 2 bolt main and there is a C in front of the 151201 stamp.

[goatless]

1971 2bbl 400.

[LATECH]

Originally Posted by goatless

1971 2bbl 400.

X2.

[jwcfbd]

Thanks guys.
So then would that make the date code I281 Oct 28 1971?

[gtofreek]

It would be September, 28'th, 1971, making it for a 72 production year car. So, technically, it's a 72 400.

[goatless]

Originally Posted by gtofreek

It would be September, 28'th, 1971, making it for a 72 production year car. So, technically, it's a 72 400.

This- I had a brain fart and only looked at the "1". Basically the same motor from '71 to '72. Different head casting number but same low compression 2 bbl set up.

Anyhow the block is still good as a 400 core to build as a 400... or a stroker.

[jwcfbd]

Originally Posted by gtofreek

It would be September, 28'th, 1971, making it for a 72 production year car. So, technically, it's a 72 400.

You would think after 43 years of birthdays in September I would know it's the 9th month and not Oct. Lol

Thanks again guys

[jwcfbd]

Originally Posted by goatless

This- I had a brain fart and only rotating the "1". Basically the same motor from '71 to '72. Different head casting number but same low compression 2 bbl set up.

Anyhow the block is still good as a 400 core to build as a 400... or a stroker.

Good to hear. My plans are to get it to a 455 with a full rotateing assembly from Butler.

[jonmachota78]

Looks to be the same block as im using. Mine came out of a '72 catalina

[72blackbird]

To me the most important numbers are the 6-digit engine block ID no., cast in raised numbers. "481988" means it's a good 400 block- end of story.

Geno

[jwcfbd]

Originally Posted by 72blackbird

To me the most important numbers are the 6-digit engine block ID no., cast in raised numbers. "481988" means it's a good 400 block- end of story.

Geno

Great thank you for that.