I put 17749s on my brother's 1970 LeMans vert with a 530 Hp motor and 4 speed. Was going to go with the Dynomax Ultraflows, but it would have been too loud with the top down. The 17749s are perfect sound wise and no drone. I used a Pypes 2.5" mandrel bent system and 2" headers.
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1967 Firechicken, 499", Edl heads, 262/266@0.050" duration and 0.627"/0.643 lift SR cam, 3.90 gear, 28" tire, 3550#. 10.01@134.3 mph with a 1.45 60'. Still WAY under the rollbar rule.
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