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eliminator18

  • Karma: +2/-0
Help!!
« on: April 03, 2015, 05:50:00 PM »
I have a gen.v 454 block, will the 781 heads work with this block? I'm told yes/no something about water passages


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81sprint

  • Karma: +18/-0
Re: Help!!
« Reply #1 on: April 03, 2015, 05:51:13 PM »
Pretty sure they will not
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aquaholic72

  • Karma: +54/-0
Re: Help!!
« Reply #2 on: April 03, 2015, 07:35:57 PM »
We have a set of 049's on a gen v 502 seems to work fine

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crewchief22

  • Karma: +66/-0
Re: Help!!
« Reply #3 on: April 03, 2015, 07:54:45 PM »
I think I remember that you can but you have to match the water ports from the GenV head gasket to the Mark IV heads. 

 
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GT Jets

  • Karma: +192/-0
Re: Help!!
« Reply #4 on: April 03, 2015, 08:43:28 PM »
Double pass the engine.  Basically feed the heads through the thermostat housing and out of the rear of manifold.  I will look for the article.

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eliminator18

  • Karma: +2/-0
Re: Help!!
« Reply #5 on: April 03, 2015, 09:31:59 PM »
Cool thanks guys


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billyletender

  • Karma: +0/-0
Re: Help!!
« Reply #6 on: April 03, 2015, 09:47:37 PM »
Lots of it
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billyletender

  • Karma: +0/-0
Re: Help!!
« Reply #7 on: April 03, 2015, 09:53:34 PM »
Oops wrong page...but sometimes beer helps...???
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86caribbean

  • Karma: +11/-0
Re: Help!!
« Reply #8 on: April 04, 2015, 08:29:03 AM »
Yes with the proper gaskets now days you can bolt on a pair of Mark IV heads to a Gen V block. I did this to my 1994 Chevy crew cab dually with a Gen V 7.4L 454. I bolted on a slicked up pair of 1973 049 Mark IV heads to that block eight years ago and never had any problems.
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