I printed and have been reading the thread from above. Lots of information- Thanks. If possible I would like to meet "The Granny" at Baytown in about a month, just let me know the date as it gets closer. I've always tuned the car with C16 but have always second guessed myself on fuel pressure. Last time out, I was at around 38 lbs.vacuum off and 29lbs.vacuum on. That's where I stopped as the car kept getting faster. I've never seen a "To Low" fuel pressure reading posted. Is there a "don't go below this FP" reading? Or will it start slowing down after its "sweet spot" lowest fuel pressure?