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Rich Biebel · 08-09-2010, 06:46 PM

Small block heads varied a lot in casting hardness and quality. Some old castings like early 461's were sometimes pretty soft and often had cracked or broken head bolt bosses.

Later heads were somewhat harder and usually better....

993's were much better than 882's for casting quality and the 882's were very often cracked and went in the scrap pile. I would have to really check over an 882 before I'd use it for anything....

I always thought the Heco in Mexico heads were better castings than a lot of the GM castings from the US......The '70's was when GM produced a lot of real junk.....cars and engines..........

08-09-2010, 06:46 PM	#5
Rich Biebel VIP Member Join Date: Jun 2007 Location: Northern New Jersey suburbs Posts: 2,275 Likes: 25 Liked 510 Times in 200 Posts	Re: SBC Heads 993, 882, 0r 624? Small block heads varied a lot in casting hardness and quality. Some old castings like early 461's were sometimes pretty soft and often had cracked or broken head bolt bosses. Later heads were somewhat harder and usually better.... 993's were much better than 882's for casting quality and the 882's were very often cracked and went in the scrap pile. I would have to really check over an 882 before I'd use it for anything.... I always thought the Heco in Mexico heads were better castings than a lot of the GM castings from the US......The '70's was when GM produced a lot of real junk.....cars and engines.......... __________________ Rich Biebel S/C 1479 Last edited by Rich Biebel; 08-09-2010 at 07:13 PM.