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Mod | | | Forums66 Topics128,020 Posts1,055,345 Members48,419 | | Most Online14,466
Apr 26th, 2026 | | AD Chevy Trucks  Over 6,000 pictures Brad Allen has an awesome collection of Chevrolet factory pictures that he has set up from film strips. Check them out!
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#13145 05/09/2002 2:47 AM | Joined: Apr 2002 Posts: 13 Junior Member | | Junior Member Joined: Apr 2002 Posts: 13 | I have a cracked 248 head, casting #2194819 my question will a 6107412 head work? There is a noticable difference between the two. My machine shop says the casting # 6107412 will have less compression. Will it be noticeable? | | |
#13146 05/09/2002 5:28 AM | Joined: Feb 2001 Posts: 1,897 Member | | Member Joined: Feb 2001 Posts: 1,897 | Yes you will notice it as a loss of power.It will then run like a chevy motor! 
There is enough good in the worst of us and enough bad in the best of us that it does not behoove any of us to criticize the rest of us.
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Be yourself. If you are ever lost, It will be much easier to find yourself if you know who you are!
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#13147 05/09/2002 12:07 PM | Joined: Jan 2000 Posts: 206 Member | | Member Joined: Jan 2000 Posts: 206 | The 4819 head was used for 228,248 & 270 GMCs thru 1963, but the 7412 head was only used on early 228s, so they are probably right about compression. Also be careful about swapping rocker shafts, pushrods etc from one head to the other as there were some changes over the years. You may save some grief by looking for another 4819 head. | | |
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