Very interesting, and I believe it. This does mean that the WOT position of the secondary rods will be different from a normal QJ, needs more R&D.
In 1967 (?) the same Pontiac motor was offered in the GTO and the Firebird: 400", hydraulic cam. It was rated 325 in the 'Bird, but 335 in the Goat.
Why?
Because the 'Bird secondary linkage did not open to 90°, which reduced max power.
This was obedience to the official GM policy of "1 HP per 10 lbs. of weight, for everything except Corvettes".
