In 1969, the NHRA instituted a 5-year rule for Super/Stockers,
forcing the 63' Max-Wedge cars back into Stock Class.
The NHRA also dropped the A/Stock class lower, (7.50 - 7.99 wt/hp).
This allowed some of the 426 Street-hemi's to get back into A/Stock.
In competition, the 63' 426/425HP Max-Wedge cars were, in most cases, able to out-run the Street-Hemi's, primarily in A/SA.
1969 NHRA Stock Classes.