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I could never understand this brand specific machinist thing. If a shop that builds mostly GM stuff can't do basic machining on my engine just because it is a Mopar, I sure as he## wouldn't want him to do machining of any kind for me. It's not rocket science. Things that are round need to be round, things that are flat need to be flat and if they need to be parallel and equidistant to something ie the crankshaft, make them that way. That stuff is all Machine Shop 101.

Cylinder head porting? Now that is rocket science.

I think the cause of a lot of these machining fiasco's is that everyone thinks that CNC is the be all and end all which is BS. Set up a CNC machine wrong or give it the wrong information and it will machine junk all day long. I would bet that is why this XR block has head bolt holes in the wrong place amongst other deficiencies. Just because it's a Rottler CNC doesn't change Machine Shop 101.

Kevin



1000%.... if you have bad data on a CNC
or a bad zero point then you get alot of trash... but
certain builders.. as in a mopar shop tend to know
more about cam choices which mopars tend to need
something different than a GM or ford... but the basic
machine work is just that... basic... like said... 101