Casting number on the back appears to read 3876010

On the front of the motor it reads MB06800

Can't find any information on it anywhere.. help would be greatly appreciated! Here is a photo of the motor

 

I have been doing some research and have found that M probably means built in mexico. I saw online a pontiac block where the second letter in the engine ID was P which = Pontiac, Im not sure if maybe the B in mine stands for buick? Just a guess.. Also saw a GM crate motor with 2800 at the end of the engine ID (which are the last four digits of the product number for the crate engine apparently) , mine is 6800 so my other guess is maybe its a crate motor? I have been searching all over. Please feel free to debunk some of my hunches

 

Engines installed in vehicles have a 2 or 3 letter code stamped on the pad that tells size /Hp / trans

 

It doesn't really matter, it's one of the most common 4" blocks cast and since it's a rebuild, it could be nearly anything.

 

I am not sure if it was installed in a car now because the suffix contains no letters. There is no partial vin number on the block either, also i could not find that casting number on any website. 010 is a high nickel block correct? the rest of the numbers i cannot seem to match. Its really made me curious. Oh and also it hasn't been rebuilt, but shows minimal wear. Stock 350 bore

 

No, that's largely a myth, for what little practical difference nickel content makes anyway.

 

Someone from another forum told me it could be a "target motor" do you know anything about those? Im pretty lost when it comes to this lol :P

 

Was a in house name for GM crate replacement engines made in Mexico way back,
http://www.novas.net/forums/showpost...7&postcount=10

 

Thanks bro