On Thursday, June 30, 2005, at 11:36 AM, Russell Duffy wrote:

   I have to disagree with your observation.  The boring
tool, by itself will not yield a surface appropriate for
seating the injector o-ring (and easy removal for service). 

 
Hi Dale,
 
I have to disagree, with your disagreement :-)   I used a boring bar, in a mill to open up the stock fuel rail holes for my MSD injectors.  I've also bored holes in a cast aluminum intake for the bottom end of the injectors.  All holes are sealing just dandy, though I was pretty paranoid about the fuel rail holes.  I must have checked those 100 times to make sure they weren't leaking, but now I hardly give them a thought.  
 
Cheers,
Rusty

In this case it depends on the operator. Using the boring bar in the lathe and being very careful on the set up, I could not achieve the polished smooth finish I was hoping for. I am self taught in machining and sometimes come up short. I don't mind having a reamer ground for the purpose. Jerry