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Re: Old air under dash vents
You will need about 3 inches from the kick panel and 3 inches down from the dash to clear a round under dash vent. The rectangle under dash vents hang down about 2 inches and are 6 inches long. On the Vintage Air kits you get round vents that go in the dash so there is'nt any clearance issues. Hope this helps.
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1968 Chevy SWB Fleetside ECE 4/6 327/350
1987 Chevy V20 Scottsdale 4X4 350/400 4.10
1987 Chevy Custom Deluxe SWB 305/7004R4
1991 Suburban Silverado V1500 4X4 350/700R4
2015 Chevy Crew Cab SWB (Daily Driver) 5.3
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