I removed my valve guides yesterday to measure for replacement, but ran into a bit of a dilemma…
When I measured the old cast iron guides, I was getting between 0.511”- 0.514”. Granted this is with a digital caliper (I need to pick up a 0-1” micrometer).
However, the project came with x2 new standard bronze guides. I tried for fitment in the bores and it is not even close. If you turn the head upside down the guides will fall out.
Because these dimensions fall outside the available…