The 400-450 heads Do-not have a fitting in the back of the head ! The tube under the valve cover is cut off and is only 6" long .
You need a valve cover off a 400,450 they have a welded in fitting so you can conect it to your air clearner. You can weld in a fitting into yours and put a hose barb in it and run a piece of rubber hose .
I put a 450 gas head on my "M" this year and i found the correct valve cover on ebay for $20.00 I also tapped a hole in the intake manifold and ran a hose from there to the valve cover insted of the air cleaner . [PVC] Works graet keeps moisture out of the motor .
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Today's Featured Article - Identifying Tractor Noises - by Curtis Von Fange. Listening To Your Tractor : Part 3 - In this series we are continuing to learn the fine art of listening to our tractor in hopes of keeping it running longer. One particularly important facet is to hear and identify the particular noises that our
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