Felix,
At the 1968 'AHRA Winternationals',
Sox & Martin ran a 1968 Road Runner 'Coupe' 426 Hemi, but it was 'not' a 'regular' 426 Street Hemi
that they ran in S/SE {Super/Stock Eliminator}
The Road Runner {#3569 lbs.} was lightened, by installing a Fiberglass 'front-clip' (Fenders and Hood),
and also had few items removed to get down to #3400 lbs.
And the the '426 Hemi' had,
* 12.5 - 1 Pistons,
* Race Hemi Aluminum Cylinder Heads
* Cross-Ram Intake Manifold
* 'Twin' Holley 770 CFM carburetors.
A far cry from the 'standard' SS/C '426 Street Hemi'.
They ran a best of
10.53 @ 132 MPH