Found
this thread where Shaker223 mentions his dyno run and states that the motor is stock other than 340 valve springs and a turbo (his first post in the thread). Further down in the thread, it appears that this "discusson" (<- pissing match) happened before he made his first drag run.
Without looking further, I feel that this supports my foggy memory that the 340 valve springs went in at the same time the turbo went on, and that he always had a stiffer spring in the head.
I suspect that if I looked farther, he might even be the source of my recollection that stiffer springs are needed when a motor is turboed.
Not poking at anyone, just documenting my shaky memory.
