mfg Posted 1 hour ago Report Posted 1 hour ago The 1963 Studebaker Avanti built in roll bar was considered, at that time, to be…..?…. stronger than the minimum requirement set by USAC for roll bars. 1) 75%……2) 140%……3) 175%…..or……4) 200%
Stacey Posted 1 hour ago Report Posted 1 hour ago In 1963 lets say if they were #1. 75% better that would be a huge improvement. So #1 is my guess.
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