Here's a few pics. Since the new valve job is not centered on the old seat insert, it's a little confusing to look at since each angled cut goes in and out of epoxy, aluminum and insert. Hopefully the color coding helps identify each cut. Cuts are 40/50/65/75/80 with the 80 blended. The red is the 50 degree seat.
The old brass guides were removed and two new 0.687" holes drilled off center. A custom 0.689" brass guide was turned and then the end that protrudes into the port was machined to match the diameter/shape of the original guides.
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