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demps45 · 07-23-2009, 02:29 PM

Mannymen - According to the NHRA specs, the stock cast iron head is listed as 104+cc, and the 401 alum head is at 103+cc. Also, the alum head motor is factored at 405HP and the cast iron head motor is at 390.

07-23-2009, 02:29 PM	#5
demps45 Junior Member Join Date: Jul 2009 Location: Lockport, NY Posts: 7 Likes: 0 Liked 0 Times in 0 Posts	Re: 396/375 Replacement cyl head Mannymen - According to the NHRA specs, the stock cast iron head is listed as 104+cc, and the 401 alum head is at 103+cc. Also, the alum head motor is factored at 405HP and the cast iron head motor is at 390. __________________ Fred Dempsey G/S, H/S, I/S, D/SA