A little update from Nick on the F355 heads:
The machinist has finished cutting the new register for the valve guides. I asked for pictures of the process to share with you and for use in my videos, which I've attached here. In the photos, you can see the original small factory chamfer compared to the much larger one they’ve machined. The factory sintered valve guides don’t have a shoulder that sits on the head, but the new manganese bronze guides include a shoulder with a 45° taper on the bottom side. Early 355s with factory bronze valve guides already have this feature machined into the head. Since your car is a later model, the machinist needed to add this feature to your heads.
The replacement valve guides were installed as of yesterday. Next week, he’ll perform the valve job, clean the heads, and handle final assembly. He’s confident that the heads will be ready to ship back out next week.
I was able to complete the bulk of the fabrication and more importantly, the problem solving for my mercury columns. I still have plenty of touch up/paint work to do, however, it is complete enough that if I needed to throw it together for use I can. Meaning, by the time I have the engine back in and running I will easily be finished obsessing with the details and we won’t be waiting for it. I went into the project with a VERY loose idea and no real plans on how I was going to execute it. So it’s nice that the “thinking” part is out of the way, now I just need to finish the “doing” part.




