go factory!
I just converted my 455 in my 72 from Holley to correct Quadrajet. I now can use correct valve covers, breather tube, Ram Air pan, choke set-up, throttle bracket, on and on. And like you, my Holley sat for a couple years, and was never the same, leaked, ran bad, so I either had to rebuild or go correct. It was a lot of nick-nacky part hunting to do my conversion, but it is far more street friendly and smooth running. And I have Ram Air!
and you don't want to screw up a shaker to fit a Holley..............
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72 Bird
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