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Jim Cimarolli · 04-19-2013, 12:15 PM

I have a pair of small block Chevy heads that I'm a bit confused about. The casting number is 3951598, but it has a 441 casted on the underside on the port, and a small X casted on the other port. Casting date is Nov. '69. Looks like they came off of a 400 sb because they have the steam holes drilled, and the holes look factory.
Anybody seen such an animal?

04-19-2013, 12:15 PM	#1
Jim Cimarolli Senior Member Join Date: Mar 2002 Location: Sulphur Springs Texas Posts: 743 Likes: 146 Liked 166 Times in 46 Posts	SBC Head Question I have a pair of small block Chevy heads that I'm a bit confused about. The casting number is 3951598, but it has a 441 casted on the underside on the port, and a small X casted on the other port. Casting date is Nov. '69. Looks like they came off of a 400 sb because they have the steam holes drilled, and the holes look factory. Anybody seen such an animal?