Is my P-code a big block?

[mopar 3 B]

You're dealing with a Chevy guy. Chevy 400s are small blocks. Mopar 400s are big blocks.

Gm produced a 400 big block for truck use.

 

[multimopes]

I think you have all the info you requested. Other than that, NICE CAR! It reminds me of mine; must be a cousin!

 

[monaco66coupe]

I did some work on the 400 big block. after working on Mopar engines I thought chevy Big blocks were pretty cheesy engines. Dinky head bolts, poor design.Just me speaking.