What is this pair of heads?

Greg Reimer 7376 · 05-04-2024, 05:47 PM

I was rooting around in the chevy. head core department of my stockpile of stuff and came up with two cylinder heads. One of them is a 3946813 number, the other is a 3917 13.The 8 is missing on it. One date code is an E 5 1.The other head is an L 8 0. They are in the classification guide as a legal replacement head for the 327 250 horse head for a '68 Chevelle or big car. I have never seen any other heads with this number, one of them I got off Ebay about 15 years ago, the other one was from a core pile at a local machine shop that is long defunct. The heads I always ran on my Chevelles was a 290 casting, a one year only casting.It only came on '68 327 250 horse engines. Another casting was the 293 casting, and these came on 327 210 horse 2 barrel Camaros only. What is the origins of the 813 head as to its OEM application? I know all these heads are 56 years old by now, but it would be interesting to find out about the OEM application of the 813 castings. Any ideas?

05-04-2024, 05:47 PM	#1
Greg Reimer 7376 VIP Member Join Date: Nov 2008 Location: Glendora,Calif. Posts: 1,136 Likes: 172 Liked 705 Times in 219 Posts	What is this pair of heads? I was rooting around in the chevy. head core department of my stockpile of stuff and came up with two cylinder heads. One of them is a 3946813 number, the other is a 3917 13.The 8 is missing on it. One date code is an E 5 1.The other head is an L 8 0. They are in the classification guide as a legal replacement head for the 327 250 horse head for a '68 Chevelle or big car. I have never seen any other heads with this number, one of them I got off Ebay about 15 years ago, the other one was from a core pile at a local machine shop that is long defunct. The heads I always ran on my Chevelles was a 290 casting, a one year only casting.It only came on '68 327 250 horse engines. Another casting was the 293 casting, and these came on 327 210 horse 2 barrel Camaros only. What is the origins of the 813 head as to its OEM application? I know all these heads are 56 years old by now, but it would be interesting to find out about the OEM application of the 813 castings. Any ideas?