GM casting head number [Archive] - Team Camaro Tech

: GM casting head number


EA's 67 rag top
Apr 15th, 00, 01:57 AM
Can anyone tell me if they know the info on the head casting number 3947040, and what does the c148 c158 mean? Thanks for the help!!!

Steve R
Apr 15th, 00, 07:43 AM
The letter is the month of the year, 15 is the day of the month, 8 is the year of the decade made. They were made in March of 58, 68, 78, 88, or 98. I don't have a parts munber book handy or I could give you an exact date.

Steve R.

tom3
Apr 16th, 00, 03:29 PM
Casting number is close to the 3947041 heads which are the camel hump 327 and 350 300HP heads. 1.94 intakes with 64cc chambers. 1968 in this case assuming the casting number is a good indication.

elcamino72
Apr 16th, 00, 04:58 PM
3947040 = 1968 327cu 64cc chambers, no accessory holes.

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Bryan Shook
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