Did NHRA Finally throw out a 440 with a 400 block?

Lynn A McCarty · 06-04-2008, 04:23 PM

The word I got from NHRA was that the 400 block is a legal swap for the 440. (SS only) Dont think you can do it for another combination unless you get special approval. They must maintain the original 440 main size to be legal. If you want to have a smaller main you just use a bearing spacer.

ALL SHORT DECKS are LEGAL (Super Stock only) if you use the approved block for your combination.

Man are they going to see some trapezoidal engine combos.

06-04-2008, 04:23 PM	#8
Lynn A McCarty Member Join Date: Jun 2002 Location: Plainfield (INDY) Indiana Posts: 468 Likes: 1 Liked 3 Times in 3 Posts	Re: Did NHRA Finally throw out a 440 with a 400 block? The word I got from NHRA was that the 400 block is a legal swap for the 440. (SS only) Dont think you can do it for another combination unless you get special approval. They must maintain the original 440 main size to be legal. If you want to have a smaller main you just use a bearing spacer. ALL SHORT DECKS are LEGAL (Super Stock only) if you use the approved block for your combination. Man are they going to see some trapezoidal engine combos. __________________ Lynn A McCarty 3470 SS Last edited by Lynn A McCarty; 06-04-2008 at 04:49 PM.