20 years ago a friend had the nascar intake on his 64. He made a top out of 1/4” aluminum with two AFB carbs, cross ram. He drove it 50 miles to shows once a week plus around town a lot but never said anything about any problems with it. Haven’t talked with him in awhile so I might call and ask him. To me it sounded good, fired right up and no attitude when leaving the shows.