Good morning Gordon, I was wondering if I could get your email. I have a pair of 45 DCOE 18's, I would like to send you images of. I am considering having these rebuilt by you when you have a chance. The venturi locating screws are safety wired, and the screws that you typically would remove to see the three bleed holes have brass cups installed there, the venturi's are 36, which leads me to believe these may have been race prepared, but I don't know. After seeing some examples of your work, you definitely are the go to guy for these. No rush when you get a chance you can email me at m3s4me@aol.com, or reach me via the BB. Thanks, Fran