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01-28-2010, 11:33 PM
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#1 |
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Member
Join Date: Nov 2002
Location: Potomac,IL
Posts: 279
Likes: 1
Liked 71 Times in 23 Posts
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Re: Mystery BBC head casting number 1X157129AC
I bet it is heads off of a 88 Tonawanda motor.
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Monte Howard 3209 STK, 3208 SS |
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01-29-2010, 12:18 PM
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#2 |
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Junior Member
Join Date: Oct 2006
Location: Lincoln
Posts: 39
Likes: 0
Liked 0 Times in 0 Posts
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Re: Mystery BBC head casting number 1X157129AC
Here is a pic of the casting number.
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01-29-2010, 06:22 PM
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#3 |
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Senior Member
Join Date: Feb 2002
Location: Southeast Michigan
Posts: 909
Likes: 70
Liked 239 Times in 114 Posts
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Re: Mystery BBC head casting number 1X157129AC
The numbering indicates they are Experimental heads, that must have been smuggled out of GM.
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01-29-2010, 10:53 PM
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#4 |
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VIP Member
Join Date: Sep 2002
Location: Tacoma, Washington
Posts: 1,632
Likes: 0
Liked 5 Times in 5 Posts
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Re: Mystery BBC head casting number 1X157129AC
I looked for it on www.mortec.com and that number doesn't show up. Good luck finding it.
Danny Durham |
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01-29-2010, 11:20 PM
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#5 | |
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VIP Member
Join Date: Sep 2009
Location: Barberton Ohio
Posts: 1,114
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Re: Mystery BBC head casting number 1X157129AC
And here is a pic of our new driver
 Im joking, but small pic......cant see...... Quote:
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01-30-2010, 04:40 AM
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#6 |
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Junior Member
Join Date: Oct 2006
Location: Lincoln
Posts: 39
Likes: 0
Liked 0 Times in 0 Posts
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Re: Mystery BBC head casting number 1X157129AC
Here is the link to the craigslist ad I found them on. It clearly shows the casting number for the disbelievers or the visually impaired.
http://desmoines.craigslist.org/pts/1557770912.html |
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01-30-2010, 05:00 AM
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#7 |
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Member
Join Date: Jan 2006
Posts: 221
Likes: 15
Liked 58 Times in 18 Posts
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Re: Mystery BBC head casting number 1X157129AC
The ad does say they are rectangle port but there isn't a picture showing them, they could be a newer vortec head or who knows???????????
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01-30-2010, 07:58 AM
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#8 |
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VIP Member
Join Date: Dec 2001
Location: Texarkana Ark/TX
Posts: 2,446
Likes: 575
Liked 880 Times in 311 Posts
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Re: Mystery BBC head casting number 1X157129AC
Date code would be a good starting point.
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Adger Smith (Former SS) |
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01-30-2010, 08:55 AM
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#9 |
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VIP Member
Join Date: Jun 2007
Location: Northern New Jersey suburbs
Posts: 2,314
Likes: 25
Liked 544 Times in 213 Posts
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Re: Mystery BBC head casting number 1X157129AC
My best guess is they are aftermarket heads. I have never seen any Chevy head with casting numbers like that. GM as far as I know only used numbers in their Chevy castings. Many heads have a seperate letter cast on the head but it was seperated from the actual casting number. An X was found on some small block heads as well as some other letters.A Date is usually also cast on the head if it's OEM.
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Rich Biebel S/C 1479 Stock 147R |
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01-30-2010, 11:47 AM
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#10 |
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Senior Member
Join Date: Apr 2003
Posts: 728
Likes: 5
Liked 13 Times in 7 Posts
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Re: Mystery BBC head casting number 1X157129AC
Does anyone own a set of the BBC heads that GM experimented with on a small block chevy or does anyone own the BBC hemi experimental heads. Just curious
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