Well I have gone and done it. All of the positive comments regarding the Edelbrock carburettors has sold me and I have purchased a brand new Edelbrock performer AFB 500cfm carby. I thought about going second hand, but i got the new one for such a good price I could not turn it down. I also sold the Holley 465 without fuss as well (maybe should have asked for more). I am looking forward to trying it out.