Holley sales a powevalve conversion kit to fix that blow out problem. I think I will stick with what I know. I have a carberator guerue that has told me that predators do like the street well. If I cannot have my Qjet I will settle for an AFB. I don't like Holleys either. To much to fiddle with. A Qjet either work or it don't. If it don't throw a kit in it and it lives! HP books puts aout a great book on Rochesters! Check it out!