Re: Steel Hemi Block Conversion
[Re: hemi-itis]
#2662878
06/05/19 11:08 PM
06/05/19 11:08 PM
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Joined: Jan 2012
Posts: 2,645
Stuttgart, Arkansas
rickseeman
master
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master
Joined: Jan 2012
Posts: 2,645
Stuttgart, Arkansas
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I don't know anything about a wedge but the 572-13 heads also use a hemi block. And I figured the best B-1's would too, but I don't know anything about such things. I assume a max performance wedge head should use a hemi block. It lets you put the ports where you want them.
2011 Drag Pak Challenger
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Re: Steel Hemi Block Conversion
[Re: camaroduster]
#2667217
06/18/19 02:16 PM
06/18/19 02:16 PM
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Joined: Jan 2010
Posts: 588
Franklin, TN
23T Hemmee
mopar
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mopar
Joined: Jan 2010
Posts: 588
Franklin, TN
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Can a steel Hemi Block be converted to use BB Wedge Heads? Yes, you need to tap the top row of head stud bosses, probably a 5/8x18 plug, and then redrill and tap the top row for the wedge pattern. They will overlap slightly at the top but will drill into virgin block material within 1/2" because of the taper on the hemi stud boss. There will be some mis-match on water passages if using stock 440 heads, which can be brazed up. Oil drainback on the hemi block will also need to be blocked.. Most aftermarket heads are profiled the same as hemi block and should cover the oil drainback. I think you would need an external drain line from head to block on a B-1 head but not positive. Can't think of any other issues, but definitely can be done with a good machinest.
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Re: Steel Hemi Block Conversion
[Re: 23T Hemmee]
#2667295
06/18/19 05:23 PM
06/18/19 05:23 PM
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Joined: Dec 2011
Posts: 201
Texas
Chief
enthusiast
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enthusiast
Joined: Dec 2011
Posts: 201
Texas
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Can a steel Hemi Block be converted to use BB Wedge Heads? Yes, you need to tap the top row of head stud bosses, probably a 5/8x18 plug, and then redrill and tap the top row for the wedge pattern. They will overlap slightly at the top but will drill into virgin block material within 1/2" because of the taper on the hemi stud boss. There will be some mis-match on water passages if using stock 440 heads, which can be brazed up. Oil drainback on the hemi block will also need to be blocked.. Most aftermarket heads are profiled the same as hemi block and should cover the oil drainback. I think you would need an external drain line from head to block on a B-1 head but not positive. Can't think of any other issues, but definitely can be done with a good machinest. This is what I was told by Koffels.. I have a KB block that I plan to convert to wedge heads so I called them.. Dave
Dave Covey
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