Does Gm still produce the 400 block?

If so whats the part number?

Chris

 

They may still have NOS blocks (New Old Stock), but the blocks were originally produced from 70-80.

 

79 or 80 was the last year they produced a production block. You can still buy a 400 bowtie block which is a much better casting to use.

 

ward,are you sure about the dates the 400 block was produced?? i have a 67 bonneville with a 400. im not tryin to be a smartass...im just curious. you can still get a 400 i believe, but i think its definetly gonna be a special order type deal. they dont put them in any of the production cars.
Justin

 

Im pretty sure, but I guess I could be wrong.

http://www.mortec.com/castnum.htm

 

If your 67 bonneville has a chev 400 block in it then someone did an engine swap. Pontiac used their own engines back then. A Pontiac 400 is not a Chev 400.

I just checked my books. 1970-1980 were the production years for the 400 SBC.

 

Oh yeah, i completely forgot that the pontiac didnt use chevy engines until 1981.

 

The last 400 fitted block part# is 14008958 & has long been discontinued. You can buy 4.125" bore bare blocks through GM Perf Parts. https://www.spoperformanceparts.com/...html?CATID=628

World & Dart also sell similar blocks.

 

Ohhh yeah... I didnt even think about that. Its definetly the original motor. I just thought GM produced the same blocks for everything, but then the individual companies added their own goodies. Hey anyone wanna see a pic of my 400 can follow the instructions in the sig
Justin

 

If only!!!

There were 400s from Chevy, Pontiac, Buick, and Olds over the years. Absolutely nothing interchanges, except the points and the rotor, and the spark plugs in some cases. It was lunacy. We can argue all day long about which one was the best; but having 4 of them was certainly ludicrous.

 

Except in Canada. Our old 1964 Pontiac Parisienne had a 283 in it.

 

Nope chebby does not produce or install the 400ci anymore..the old man had one in his 74' chevy wagon..jesus christ what a beast it was..lol..the good ole days...later.

 

And don't forget that Cadilac produced beasts all of their own design. There was even a sepatate set of engines for Packard when they were still in business with GM.

 

.

 

I work for gm in an engine plant. the assy line that the 400 was built on now puts out 4.3 l v 6s and is shutting down in AUG of 03 to a inline 5 cyl