CLASS RACER FORUM - View Single Post - Mystery BBC head casting number 1X157129AC

6T9chevelle · 01-30-2010, 09:06 PM

That is an excellent bit of info. Do you have any idea what heads these could have been based on? Also GM typically uses a 3 digit date code. Any info on the 2 digit code?

Jeff

01-30-2010, 09:06 PM	#17
6T9chevelle Junior Member Join Date: Oct 2006 Location: Lincoln Posts: 39 Likes: 0 Liked 0 Times in 0 Posts	Re: Mystery BBC head casting number 1X157129AC That is an excellent bit of info. Do you have any idea what heads these could have been based on? Also GM typically uses a 3 digit date code. Any info on the 2 digit code? Jeff