Fair question Verne. So, this is what I know. OO told me that when he had his car set up for its best results at the track for the quarter mile, he had M&H slicks that were 29.5" tall (on 15x7" wheels) and with such a tall tire he finally settled on 4.88 gears. He remembered the engine revving to 6200 rpm through the traps with this set up. This photo was taken in 1971 with the tall M&H's out back, so I can't tell you when he actually bought these, but maybe some others will have information on when they were debuted.
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Sam... 
Last edited by mockingbird812; 03-09-2018 at 06:11 PM.
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03-09-2018, 01:46 PM
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