ET'S with ported J/or other iron heads SB

The clutch is key....... but even when what he was running for a clutch was clearly not optimum for the car....... it was still pretty quick for what it was.

3650lb GTO, Pontiac 400 Stocker build, 4 speed......11.30’s in F/S...... 20 or so years ago.

That car never had the clutch situation figured out.
That didn’t happen until he was a few years into the Firebird.