Process to install the bolt in Lump kit on a Head Shop. These machines are used in a engine rebuild shop. We did not discuss the Bolt boss removal. That is done in another video we did.
Info on what this modification does for the head.
https://www.12bolt.com/65279inline-cy...
Tools needed
3 Drill bits: 9/32 for counter sinking Holding bolt or 8/32 counterbore
11/64 for #8 bolt through the head
#29 for drilling hole to thread in lump
8/32 tap
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