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  #1  
Old 02-18-2021, 11:35 PM
DRohacek DRohacek is offline
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Default Flat head converted to overhead valve

This pulling engine is an aftermarket flathead Jones block . It is a heavier built block modeled after a Kohler K series that uses K series type parts. We turned this into an overhead valve engine using an Oldsmobile 455 head with roller rockers and other aftermarket parts inside to end up at 53 cubic inches and 13.5 compression

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  #2  
Old 02-18-2021, 11:38 PM
DRohacek DRohacek is offline
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More photos
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Old 02-18-2021, 11:52 PM
DRohacek DRohacek is offline
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Couple more
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Old 02-20-2021, 07:54 PM
twoton twoton is offline
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Very cool.
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Old 02-21-2021, 12:29 AM
DRohacek DRohacek is offline
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Quote:
Originally Posted by twoton View Post
Very cool.

Thanks. I started with the Stromberg 2 barrel on gas but eventually changed it to a 44 Mikuni side draft on Methanol.
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Old 02-27-2021, 12:20 PM
V30crewcab V30crewcab is offline
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that is impressive. why cut up the head though, would it not be easier to build a custom head, or is that not allowed in the rules?
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Old 02-27-2021, 10:07 PM
DRohacek DRohacek is offline
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Quote:
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that is impressive. why cut up the head though, would it not be easier to build a custom head, or is that not allowed in the rules?
To make a head from scratch out of billet aluminum would require a tremendous amount of machining. When you are done it would not necessarily be any better. No need to reinvent the wheel, just adapt a known good wheel to the project. Additionally, I acquired this head from a friend because it had a crack on one of the intake ports where it had been ported to deeply. Essentially it was junk to use on a V8 again but was perfect for my plan and big valves had already been installed. I used roller rockers and fit it to the block.
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Old 02-27-2021, 10:20 PM
DRohacek DRohacek is offline
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Intake is 2.15 pretty good flowing head to.
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Old 02-28-2021, 11:06 AM
V30crewcab V30crewcab is offline
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cool. its amazing what you can make work!
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IH 404 tractor
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