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What heads on the 420HP

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Old 09-28-2006, 09:11 PM
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Default What heads on the 420HP
What heads came on the MERC 420HP engine?
Thanks
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Old 09-28-2006, 10:45 PM
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Default Re: What heads on the 420HP
They are the Chevy Hi-Perf , Reqtangler ports. Good Heads work well out of the box ,with a little bit of work they work better. Not possitive of the casting number tho.
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Old 09-29-2006, 05:33 AM
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Default Re: What heads on the 420HP
I have a set for sale...188s...Fresh..Stainless/Inconel valves..ports cleaned up & checked for cracks....Ready to go
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Old 09-29-2006, 06:46 AM
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Default Re: What heads on the 420HP
Birddog,
What did your set come off?
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Old 09-29-2006, 02:16 PM
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Default Re: What heads on the 420HP
Originally Posted by gripit
Birddog,
What did your set come off?
540 "Bulldogs"
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