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mannymen · 09-30-2009, 10:23 PM

Are there any differences (intake/exhaust volume) between the BBC 840 head and the 391 head? I don't see the intake/exhaust runner size for the 391 head on the NHRA website, but it's listed in the engine blueprint spec guide.

Thanks
Manny

09-30-2009, 10:23 PM	#1
mannymen Senior Member Join Date: Apr 2003 Posts: 728 Likes: 5 Liked 13 Times in 7 Posts	BBC Cylinder Head Casting #'s Are there any differences (intake/exhaust volume) between the BBC 840 head and the 391 head? I don't see the intake/exhaust runner size for the 391 head on the NHRA website, but it's listed in the engine blueprint spec guide. Thanks Manny __________________ N/A