What you said about the new 603 head that still leaks doesn’t surprise me – apparently the machine work on the new head castings is not very good.

The only person that I trust *implicitly* with all the machine shop work on every MBZ engine that I have ever had (and many other friends as well) told me that oftentimes they need to re-work the new 603 castings to get them to be spot-on. And he really *knows* MBZ engines due to years of re-manufacturing experience, plus he is a straight shooter – no B.S.

Good luck on your project – keep us all posted, and I’ll do the same…

RTH