Dwayne told me years ago to send my Eddy RPM to Modern for CNC porting, that was before Jeff passed away work
I had him do several CNC porting on some B1-BS and some other 440-1 , all ran good on the motors up
Bob has told me several years ago that he is very busy now and the normal porting delivery time is about 3 to 4 months out after he receives them work
I tried a local roundy round race machine shop in Vancouver, WA last year on one of my own street motors and ended up being very disappointed on a set of 440-1 that I wanted them to replace the valve guides and anything else they needed, they came back with the guides way looser than I like or expected down whiney They had done some other street motor head work for me in the past that was good, not anymore now down
My message is go for the best you can get when it comes to head work, just like brain surgery work grin

Mr.Cab Racing and winning with Mopars since 1964. (Old F--t, Huh)