I've had a set sitting around forever. Got them at a pretty good price at Summit with a 15% sale and I got a good deal through Modern to get them CNC ported. Scott Brown set them up for me. Unfortunately the machine shop buggered my block and then I moved so everything had been on hold for two years now I think. The two things I remember is I had to spend a night or two clearancing the pushrods holes (this was two years ago so they may have fixed that by now). Also the heads are long, I had to machine one end on one head so it wouldn't interfere with the mid plate.