what engine do I have
 

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

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

1971 2bbl 400.

X2.

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

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". :o 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.

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

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

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

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.