I’ve always assumed Genuine Suspension was the originator with many copycats that followed. Art Morrison/Dick Gazan probably had the most high quality version that were available in the ‘90’s. They definitely work well by re-locating the intersection points. I’ve always thought it was cool to see a 12 bolt at a swap meet with those distinctive holes drilled thru the webbing that indicate a set was once installed!
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1962 Biscayne O-21669 MKIV/M-22
1962 Bel Air Sport Coupe 409/1,000
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